Isingeniso
Ukukhetha imishini yokuxhumana yezindawo eziyingozi kuhilela okungaphezu nje kokufanisa izici nentengo. Emaphrojekthini ezimboni, ifoni engaqhumi kumele ihlangabezane nemithetho yokuhlukaniswa kwendawo, imelane nezimo zokusebenza ezinzima, futhi ihlale ithembekile ngesikhathi sezimo eziphuthumayo lapho ukuxhumana kubaluleke kakhulu. Lo mhlahlandlela uchaza amazinga abalulekile, imininingwane yobuchwepheshe, kanye nezici zemvelo okufanele zakhe isinqumo sokuthenga. Abafundi bazofunda ukuthi bangaqhathanisa kanjani izidingo zesitifiketi, ukuqina kwesikhala, ukusebenza komsindo, izidingo zamandla nokufakwa, kanye nokucatshangelwa kokugcinwa komjikelezo wokuphila, okwenza kube lula ukukhetha imishini esekela ukuhambisana, ukuqhubeka kokusebenza, kanye nokuphepha kwabasebenzi.
Kungani Umhlahlandlela Wokuthenga Ucingo Obonisa Ubufakazi Bokuqhuma Kubalulekile
Ukuthola imishini yokuxhumana yezindawo zezimboni eziyingozi kudinga ukuzulazula ku-matrix eyinkimbinkimbi yezindinganiso zokuphepha, imininingwane yobuchwepheshe, kanye nezidingo zokusebenza. Ucingo olungaqhumi aluyona nje idivayisi yokuxhumana; luyimpahla ebalulekile yokuphepha empilweni eyenzelwe ukuvimbela ukushiswa kwamagesi aguquguqukayo, umusi, noma uthuli oluvuthayo. Ukukhetha imishini engalungile kungabangela ukwehluleka okukhulu, izinhlawulo zomthetho, kanye nezingozi ezinkulu zabasebenzi.
Lo mhlahlandlela unikeza ochwepheshe bobunjiniyela, ukuthenga, kanye nokusebenza ngendlela ehlelekile yokuhlola, ukukhetha, kanye nokusebenzisa izingcingo ezingaqhumi. Ngokuqonda izidingo eziqinile zokuhlukaniswa kwezindawo eziyingozi, izinhlangano zingenza ngcono izindleko zazo zezimali ngenkathi ziqinisekisa ukuxhumana okungaphazanyiswa ngesikhathi sezikhathi ezibalulekile zokusebenza.
Indlela ukwehluleka kokuxhumana endaweni eyingozi okwandisa ngayo ingozi yephrojekthi
Emikhakheni enobungozi obukhulu njengokucwengisisa uphethiloli, ukumba ogwini lolwandle, kanyeukumbiwa komhlaba, ingqalasizinda yokuxhumana yakha umgogodla wempendulo ephuthumayo. Uma ucingo olujwayelekile lwezimboni lungasebenzi esimweni esishintshashintshayo, lungasebenza njengomthombo wokushisa. Ngale kwengozi yokuqhuma okusheshayo, umphumela wesibili wokwehluleka kokuxhumana ukubambezeleka kwempendulo ephuthumayo. Ezimweni ezibucayi, ukubambezeleka ngale kwefasitela elijwayelekile lempendulo ephuthumayo yemizuzu emi-3 kungandisa izehlakalo zendawo zibe yizinhlekelele zezikhungo zonke.
Ngaphezu kwalokho, isikhathi sokungasebenzi kokuxhumana sinemiphumela emibi kakhulu kwezezimali.umkhakha kawoyela negesi, isikhathi sokungasebenzi esingahleliwe singadlula u-$250,000 ngehora. Uma isikhungo sokusebenza singakwazi ukuxhumana nochwepheshe basensimini endaweni ye-Zone 1 ngenxa yokungasebenzi kahle kocingo, ukukhiqiza kumele kuvame ukumiswa kuze kube yilapho isixhumanisi sokuxhumana siphinde sasungulwa. Ukutshala imali emishinini eqinisekisiwe engaqhumi kunciphisa lokhu kuphazamiseka kokusebenza okubizayo ngenkathi kugcinwa ukuhambisana okuqinile nemithetho yokuphepha emsebenzini.
Yiziphi izindawo zezimboni ezidinga izingcingo ezingaqhumi
Isidingo sefoni engaqhumi sinqunywa ukuba khona kanye nokuvama kwemimoya eqhumayo, ehlukaniswe emhlabeni wonke ngezinhlelo zeZone noma zeDivision. Izikhungo ezisingatha ama-hydrocarbon aguquguqukayo, njengezindawo zokugcina i-LNG, izikhungo zokucubungula amakhemikhali, kanye nezindawo zokugcina uphethiloli zezindiza, ngokwemvelo zidinga izindawo zokuxhumana eziqinisekisiwe ngezikhathi ezithile.
Izindawo ezahlukene zilawula amazinga ahlukene okuvikelwa kwemishini. Isibonelo, indawo yokuphatha okusanhlamvu ebhekene nothuli oluvuthayo idingaIsitifiketi se-ATEX Zone 21 noma 22, kanti indawo yokugaya uwoyela engaphandle kolwandle idinga izitifiketi zegesi ze-Zone 1 noma ze-Zone 2. Ukuqonda ukuhlukaniswa okuthile kwendawo yokufaka kuyisinyathelo sokuqala esiyimpoqo enqubweni yokuthenga.
| Ukuhlukaniswa Kwendawo (IEC/ATEX) | Izinga laseNyakatho Melika (i-NEC) | Imvamisa Yengozi | Izinga Lokuvikela Imishini Elidingekayo (i-EPL) |
|---|---|---|---|
| Indawo 0 | Isigaba I, Isigaba 1 | Izikhathi eziqhubekayo / Ezinde | I-Ga (Iphephile Ngokwemvelo kuphela) |
| Indawo 1 | Isigaba I, Isigaba 1 | Ngezinye izikhathi ekusebenzeni okuvamile | I-Gb (Ingashisi I-Ex d, Ukuphepha Okuthuthukisiwe I-Ex e) |
| Indawo 2 | Isigaba I, Isigaba 2 | Izikhathi ezingavamile / Ezifushane | I-Gc (Ayishisi, Ukuphefumula Okukhawulelwe) |
Izidingo Zobuchwepheshe Nokuthobela Imithetho
Ukuhlola ifoni engaqhumi kudinga ukuqonda okuningiliziwe kwezincazelo zayo zobuchwepheshe kanye nokuhambisana nemithetho. Abathengi bezimboni kumele babheke ngale kokusebenza okuyisisekelo ukuze bahlole ukuthi ubunjiniyela bedivayisi buhambisana kanjani nezingozi ezithile zendawo yokufakwa.
Yiziphi izilinganiso kanye nezitifiketi zendawo eyingozi ezibalulekile
Isisekelo sanoma iyiphi imishini yendawo eyingozi yisitifiketi sayo. Izinhlaka eziqashelwa emhlabeni wonke zifaka phakathi i-ATEX (Europe), i-IECEx (International), kanye ne-UL/CSA (North America). Ucingo olusetshenziswa endaweni eyingozi kumele lube nezimpawu ezifanele, njenge-'Ex d' yezindawo ezivalekile ezingashisi umlilo, ezenzelwe ukuqukatha ukuqhuma kwangaphakathi ngaphandle kokushisa umoya wangaphandle. Ngaphandle kwalokho, i-'Ex i' isho ukuphepha kwangaphakathi, lapho amandla kagesi ekhawulelwe ngaphansi komkhawulo wokushisa wengxube ethile yegesi.
Abathengi kumele baqinisekise iqembu legesi (isb., IIA, IIB, noma i-IIC yamagesi aguquguqukayo kakhulu njenge-hydrogen) kanye nesigaba sokushisa (T1 kuya ku-T6). Isibonelo, isilinganiso se-T6 siqinisekisa ukuthi izinga lokushisa eliphezulu kakhulu lomshini ngeke lidlule ku-85°C (185°F), okwenza kube kuphephile ezindaweni ezinamakhemikhali okushisa aphansi okuzenzakalelayo njenge-carbon disulfide.
Indlela yokuqhathanisa indawo ebiyelwe, ukuvikelwa kokungena, kanye nokuqina
Izindawo zezimboni ziveza imishini esimweni sezulu esibi kakhulu, amakhemikhali agqwalisayo, kanye nomthelela ongokwenyama. Ngenxa yalokho, izilinganiso zezinto ezivalekile kanye nokuvikelwa kokungena (i-IP) ziyizilinganiso ezibalulekile zokuqhathanisa. Iningi lezingcingo ezivikela ukuqhuma ezisezingeni eliphezulu zinikeza isilinganiso se-IP66 noma se-IP67, okuqinisekisa ukuvikelwa okuphelele ekungeneni kothuli kanye nokumelana namajethi amanzi anomfutho ophezulu noma ukucwiliswa kwesikhashana.
Ukukhethwa kwezinto kunquma ukuqina kwesikhathi eside. I-Glass Reinforced Polyester (GRP) inikeza ukumelana okuhle kwamakhemikhali kanye ne-UV, okwenza kube kuhle kakhulu ezitshalweni zamakhemikhali zasogwini. I-aluminium yezinga lolwandle ivame ukusetshenziswa ezimbonini ezivamile, kuyilapho insimbi engagqwali engu-316L iyindinganiso yegolide yamapulatifomu asogwini ngenxa yokumelana kwayo okungenakuqhathaniswa nokugqwala kwe-salt-spray. Ngaphezu kwalokho, abathengi kufanele bagunyaze isilinganiso sokumelana nomthelela we-IK10, baqinisekise ukuthi indawo ebiyelwe ingamelana nomthelela wama-joule angu-20 ngaphandle kokubeka engcupheni ubuqotho bayo bokumelana nokuqhuma.
Yiziphi izici zomsindo, ukusayina, kanye namandla ezibalulekile
Ezindaweni lapho umsindo ozungezile uvame ukudlula khona u-80 dB kuya ku-90 dB, amakhono omsindo ajwayelekile awanele. Ucingo olungangeni ukuqhuma kumele lube namamakrofoni asezingeni eliphezulu okukhansela umsindo kanye nama-amplifier ahlanganisiwe. Ama-ringers noma ama-beacon angaphandle ahlanganisiwe avame ukudingeka, adinga amazinga okukhipha umsindo phakathi kuka-90 dB no-110 dB ukuze azwakale emishinini esindayo.
Ukwakhiwa kwamandla kubaluleke ngokulinganayo. Amamodeli e-VoIP/SIP anamuhla avame ukusebenzisa i-Power over Ethernet (PoE) enamathela ezindinganisweni ze-IEEE 802.3af (15.4W) noma i-802.3at (30W), okwenza kube lula ukufaka ngokuhlanganisa amandla nedatha kukhebula elilodwa. Izinhlelo ze-analog zivame ukuthembela ku-amandla omugqa avela ku-PBX(kusukela ku-24VDC kuya ku-48VDC) noma kudinga amandla e-AC mains endawo (110-230VAC) ukuze kushayelwe imisindo yangaphandle ene-decibel ephezulu kanye nama-beacon abonakalayo.
Indlela Yokuqhathanisa Izinketho Zocingo Ezifakazela Ukuqhuma
Uma izidingo zobuchwepheshe sezimisiwe, amaqembu okuthenga kumele ahambe ngendlela yabathengisi. Ukuqhathanisa izinketho kuhilela ukuhlaziya kokubili ukuthembeka kwabathengisi kanye nobuchwepheshe bokuxhumana obuyisisekelo ukuqinisekisa ukuhlanganiswa okungenamthungo nengqalasizinda yesayithi ekhona.
Yiziphi izindlela okufanele zisetshenziswe ekuqhathaniseni umthengisi
Lapho kuhlolwa abahlinzeki abangaba khona, abathengi bezimboni kufanele babeke phambili izilinganiso zokuthembeka eziqinisekisiwe kanye nokuqina kochungechunge lokuhlinzeka. Isibonakaliso esibalulekile sekhwalithi yi-Mean Time Between Failures (MTBF). Izingcingo ezingangeni ukuqhuma kwezimboni kufanele zibonise i-MTBF edlula amahora angu-50,000 ngaphansi kokusebenza okuqhubekayo. Imigomo yewaranti nayo isebenza njengommeleli wekhwalithi; abakhiqizi abathembekile bavame ukunikeza iminyaka emi-2 kuya kwemi-3 yokumbozwa kwewaranti ephelele.
Izindlela zokulawula izinto zibaluleke ngokulinganayo. Imishini ekhethekile yendawo eyingozi ivame ukuba nezikhathi zokukhiqiza ezinde. Abathengi kufanele balindele izikhathi zokuhola ezijwayelekile zamasonto ama-4 kuya kwayi-8, yize ukucushwa okwenziwe ngokwezifiso okubandakanya ukudluliselwa okukhethekile noma ukuphela kwe-fiber-optic kunganwetshwa kuze kube amasonto ayi-12. Ngaphezu kwalokho, Ubuningi Boku-oda Obuncane (ama-MOQ) kufanele buhlolwe; ngenkathi amaphrojekthi amakhulu ehlangabezana kalula nama-MOQ aphezulu, ukulungiswa noma ukuthunyelwa kwe-pilot kungadinga abathengisi abazimisele ukuhlinzeka ngamayunithi ayi-1 kuya kwayi-5 ngaphandle kwezindleko ezengeziwe ezinkulu.
Yiziphi izingxabano ezikhona phakathi kwamamodeli e-analog, i-VoIP, ne-SIP
Ukukhetha phakathi kwezakhiwo ze-analog, i-VoIP, kanye ne-SIP kuthinta kakhulu ubunzima bokufakwa kanye namakhono esistimu. Izingcingo ze-analog zithembeke kakhulu, zisebenzisa ingqalasizinda yethusi yezintambo ezimbili, futhi zingadlulisela izimpawu ebangeni elide elingaphezu kwamamitha angu-5,000 ngaphandle kokukhulisa. Kodwa-ke, azinazo izindlela zokuxilonga ezithuthukisiwe futhi zidinga izintambo zikagesi ezihlukene zezesekeli zokubonisa ezisindayo.
Ngakolunye uhlangothi, izingcingo ze-VoIP kanye ne-SIP zihlangana ngqo namanethiwekhi e-IP-PBX anamuhla, zinikeza ukuphathwa okukude, ukuqapha kwe-SNMP, kanye nokubika amaphutha okuzihlola. Ukushintshana okuyinhloko ukulinganiselwa kwebanga; i-Ethernet ejwayelekile ikhawulela ukudluliselwa kumamitha ayi-100, okudinga abaguquli bemidiya ye-fiber-optic noma ukushintsha kwenethiwekhi okuphephile ngaphakathi ukuze kusetshenziswe kabanzi ensimini.
| Ukucaciswa Kwesici | Ucingo Lobufakazi Bokuqhuma Kwe-Analog | Ucingo Oluvikela Ukuqhuma kwe-VoIP / SIP |
|---|---|---|
| Ingqalasizinda Yezintambo | Ithusi elijwayelekile elinezintambo ezimbili | I-Cat5e / I-Cat6 / I-Fiber Optic |
| Ibanga Eliphezulu Lokudlulisa | > amamitha angu-5,000 | Amamitha ayi-100 (ithusi elingenayo iswishi esebenzayo) |
| Ukulethwa Kwamandla | I-PBX Line inamandla / i-24VDC yendawo | I-PoE (IEEE 802.3af/at) noma i-110-230VAC yendawo |
| Ukuxilongwa Okukude | Kunqunyelwe (ukuhlolwa kwe-voltage yomugqa kuphela) | Okuthuthukisiwe (i-SNMP, ukuqapha i-web-interface) |
| Ibhendi Yezindleko Zehadiwe Ejwayelekile | $800 – $1,500 ngeyunithi ngayinye | $1,200 – $2,800+ ngeyunithi ngayinye |
Izinyathelo Zokuthenga, Ukufaka, Nokulungisa
Ukuthola ihadiwe kuyingxenye encane nje yomjikelezo wokuphila wokufakwa. Kudingeka iziqu zomhlinzeki eziqinile, izinqubo zokuhlola eziqinile, kanye nezinqubo zokufaka ngokucophelela ukuze kugcinwe ubuqotho bokuphepha kokuqhuma kohlelo lokugcina.
Indlela yokufanelekela abahlinzeki nokubuyekeza amadokhumenti
Ukufaneleka komhlinzeki wemishini yendawo eyingozi kudlulela ngaleisitifiketi esijwayelekile se-ISO 9001Abathengisi kumele babe nesaziso se-ATEX Quality Assurance (QAN) noma umbiko wokuhlola ikhwalithi we-IECEx (QAR). Lezi zitifiketi ziphoqelela ukuthi umenzi agcine ukulandelelwa okuqinile kwazo zonke izingxenye ezibalulekile, aqinisekise ukuthi iyunithi ethunyelwe ifana nesibonelo esiqondile esihlolwe umzimba owazisiwe.
Amaqembu okuthenga kumele afune iphakheji ephelele yamadokhumenti ngaphambi kokuthunyelwa. Leli fayela kumele lifake iSimemezelo Sokuhambisana (i-DoC), izitifiketi zendawo enobungozi, izincwadi zomsebenzisi, kanye nemibandela ethile yokusebenzisa (evame ukukhonjiswa ngo-'X' ekugcineni kwenombolo yesitifiketi). Ukuntuleka kwamadokhumenti kungabangela ukwehluleka ngokushesha ngesikhathi sokuhlolwa kokuphepha kwendawo.
Okufanele ukuhlole ngesikhathi sokuhlolwa kokwamukelwa kwefektri
Ukuhlolwa Kokwamukelwa Kwemboni (i-FAT) kuyindlela ebalulekile ngaphambi kokuba imishini ishiye umenzi. Abathengi kufanele bacele izinqubo ze-FAT eziqinisekisa kokubili ukucaca kokuxhumana kanye nemikhawulo yokuphepha. Ukuhlolwa kwe-acoustic kumele kuqinisekise ukuthi ukukhanselwa komsindo wemakrofoni kusebenza kahle ngokumelene nomsindo wangemuva olinganisiwe okungenani ongu-85 dB.
Ukuhlolwa kokuphepha kukagesi kubaluleke kakhulu. Kumayunithi asebenzisa amandla amakhulu, ukuhlolwa kwamandla e-dielectric (ngokuvamile kusetshenziswa i-1.5kV AC umzuzu owodwa) kuqinisekisa ubuqotho bokufudumeza. Abakhiqizi abadumile bagcina izinga lokukhubazeka elingaphansi kuka-0.5% ngesikhathi se-FAT. Noma iyiphi iyunithi ehlulekayo kulezi zimingcele kumele ihlukaniswe futhi isetshenziswe kabusha ngaphambi kokuthunyelwa.
Indlela yokuhlela ukuhlola indawo, ukufaka, kanye nokuqalisa ukusebenza kwayo
Ukulungiselela ukufakwa kuqala ngokuhlola indawo okuningiliziwe ukuze kutholakale indlela yokuhambisa ikhebula, amaphrofayili omsindo ozungezile, kanye nezindawo zokufaka zesakhiwo. Abafaki kumele banake kakhulu ukufakwa kwekhebula; izingcingo ezingaqhumi zivame ukuba nokufakwa kwentambo ye-M20 noma engu-1/2-intshi ye-NPT. Ukusebenzisa izindlala zekhebula ze-Ex d noma ze-Ex e eziqinisekisiwe kuyimpoqo, njengoba indlala ejwayelekile izosusa isilinganiso sokuphepha sendawo yonke.
I-Ergonomics kanye nokufinyeleleka kuphoqa ukuthi izingcingo kufanele zifakwe endaweni ephakeme kusukela ku-1.2m kuya ku-1.5m (47 kuya ku-59 inches) ukusuka ezingeni lephansi eliqediwe (FFL), ngokuhambisana nezindinganiso ze-ADA noma zokufinyeleleka kwendawo lapho kufanele khona. Ngemva kokufakwa, kumele kusungulwe isimiso sokulungisa esiqinile, esinokuhlolwa okubonakalayo njalo ezinyangeni eziyi-6 kuya kweziyi-12 ukuhlola ukuwohloka kwesivalo, ukugqwala ezindleleni zomlilo, kanye nobuqotho bezintambo ezivikelwe.
Indlela Yokwenza Isinqumo Sokuthenga Kokugcina
Isinqumo sokugcina sokuthenga sidinga ukulinganisela izidingo zobuchwepheshe nezimo zezimali. Ngokuvumelanisa isimo esithile sesicelo nohlaka lwesinqumo oluhlelekile, izinhlangano zingakhetha imishini enikeza ukuphepha okuphezulu kanye nokusebenza kahle.
Yiziphi izimo zohlelo lokusebenza ezisiza ekunciphiseni ukukhetha
Ukuchaza isimo esiqondile sokusetshenziswa kunciphisa kakhulu insimu yemikhiqizo ephumelelayo. Isibonelo, umshini wokumba ogwini lolwandle ovezwe ezindaweni ezinosawoti kanye nesimo sezulu esibi kakhulu udinga ucingo lwe-SIP oluyinsimbi engagqwali oluyi-316L, olunesilinganiso se-IP67 olune-beacon ehlanganisiwe engu-110 dB. Lokhu kulungiselelwa kuvame ukuwela ebhendini lezindleko eziphezulu ukusuka ku-$1,800 kuya ku-$2,800+ ngeyunithi ngayinye.
Ngokuphambene nalokho, indawo yokucubungula imithi noma amakhemikhali yangaphakathi esebenza endaweni ye-Zone 1 ingadinga kuphela ifoni ye-analog ene-GRP, enesilinganiso se-IP66. Ngaphandle kwesidingoukuvimbela isimo sezulu ngokweqilenoma ukuxhumana kwe-IP okuyinkimbinkimbi, lesi simo sivumela isu lokuthenga elingabizi kakhulu, elinamayunithi athembekile atholakala ebangeni lama-$800 kuya ku-$1,500. Ukuhlonza lezi zindlela eziqondene nesimo esithile kuvimbela ubunjiniyela obukhulu kanye nokusetshenziswa kwemali okuchitha imali.
Yiluphi uhlaka lwesinqumo oluvumelanisa ubunjiniyela, ukuthengwa kwempahla, kanye nokuvula
ukudla
Isinqumo sokuthenga esiphumelelayo sincike ohlakeni lwe-Total Cost of Ownership (TCO) oluhlolwe esikhathini sokuphila kwezimboni esijwayelekile seminyaka eyi-10. Amaqembu obunjiniyela abeka phambili ukuthobela imithetho, i-MTBF, kanye nokuhlanganiswa kwesistimu. Ukuthengwa kwempahla kugxila ekusetshenzisweni kwemali yokuqala (i-CAPEX), izikhathi zokuhola, kanye nemigomo yabathengisi. Amaqembu okusebenza nokulungisa akhathazekile nge-Operating Expenditure (OPEX), egxile ekulungisweni okulula, ukutholakala kwezingxenye ezisele, kanye namakhono okuxilonga.
Ngokusebenzisa amamodeli e-SIP/VoIP, izinhlangano zingase zibhekane ne-CAPEX yokuqala ephezulu ngo-20% kuya ku-40% uma kuqhathaniswa nezinhlelo ze-analog. Kodwa-ke, i-OPEX yehla kakhulu ngenxa yamakhono okuqapha akude, okususa isidingo sokuhlolwa kwensimu ngokomzimba ukuze kuqinisekiswe isimo sedivayisi. Ekugcineni, ukuvumelanisa lezi zinto ezintathu ezibalulekile zomnyango kuqinisekisa ukuthi ifoni ekhethiwe engaqhumi ihlinzeka ngokuhambisana nokuphepha okuqinile, ukusebenza kahle kwezezimali, kanye nokusekelwa kokusebenza kwansuku zonke okungenamthungo.
Izinto Ezibalulekile Okufanele Uzicabangele
- Iziphetho ezibaluleke kakhulu kanye nesizathu socingo oluvikela ukuqhuma
- Imininingwane, ukuhambisana, kanye nokuhlolwa kwengozi okufanele kuqinisekiswe ngaphambi kokuthi uzibophezele
- Izinyathelo ezilandelayo ezisebenzayo kanye nezixwayiso abafundi abangazisebenzisa ngokushesha
imibuzo ejwayelekile ukubuzwa
Yisiphi isitifiketi okufanele ifoni engaqhumi ibe naso kuwebhusayithi yami?
Qondanisa ifoni nendawo yakho eyingozi: i-ATEX/IECEx yamaphrojekthi amaningi omhlaba, kanye ne-Zone efanele, iqembu legesi, kanye nesigaba sokushisa njenge-Zone 1, IIC, T6.
Ingabe isilinganiso se-IP66 noma se-IP67 sanele kumaphrojekthi ezimboni ayingozi?
Kuyasiza, kodwa akwanele kuphela. Sebenzisa i-IP66/IP67 ukuze uvikele uthuli namanzi, bese uqinisekisa ukuthi ifoni inesitifiketi esidingekayo sokuvikela ukuqhuma kwendawo.
Yiziphi izimboni ezivame ukudinga izingcingo ezingaqhumi?
Zivame ukusetshenziswa emafutheni nasegesini, ezitshalweni zamakhemikhali, ezisekelweni zasogwini, ezimayini, ezindaweni zokugcina uphethiloli, nasezindaweni ezinobungozi bothuli njengezindawo zokucubungula okusanhlamvu.
Ngingaqinisekisa kanjani ikhwalithi yomkhiqizo kanye nokuthembeka kokulethwa okuvela ku-Siniwo?
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Isikhathi sokuthunyelwe: Meyi-20-2026