
Uma uzwa 'ikhava yengilazi eyenziwe ngokwezifiso', umcabango osheshayo wabaningi, ngisho nabathengi abathile embonini yethu, ugxumela ekushintsheni kosayizi olula noma ilogo yelogo. Leso isicupho sezinga eliphezulu. Ukwenza ngokwezifiso kwangempela, ikakhulukazi kwezimpahla zasekhishini ezisebenzayo njengezivalo zamabhodwe, amapani, nama-casseroles, kuyingxoxo phakathi kwenhloso yedizayini, i-thermal physics, imikhawulo yokukhiqiza, kanye nezindleko. Akukhona nje ukwenza isimo esiyingqayizivele; imayelana nobunjiniyela ingxenye okufanele iphile ekushayweni okushisayo, igcine uphawu, ibambe ukuhlanzwa okuphindaphindiwe, futhi ikwenze njalo ngokungaguquguquki kumakhulu ezinkulungwane zamayunithi. Igebe phakathi komdwebo nesampula esilungele ukukhiqiza yilapho indaba yangempela ikhona.
Ngikhumbula iphrojekthi ethile eminyakeni embalwa edlule. Iklayenti laseYurophu lalifuna isivalo sengilazi esihle esihle, esiwunxande sesitsha sokubhaka sobumba. Umklamo wabo wawunamakhona abukhali, angama-degree angama-90. Kubukeka kukuhle ephepheni, iphupho elibi engilazini epholile. Ukushisa kudinga ukushisisa bese kupholiswa ngokushesha ingilazi ukuze kudaleke ukuminyanisa kwendawo. Amakhona acijile abe yizinto ezigxilisa ukucindezeleka; ngesikhathi sokuthukuthela noma kamuva ngesikhathi sokusetshenziswa, lokho kucindezeleka kungathola iphuzu lokukhululwa-ukuqhekeka. Kwakudingeka siwaqondise emngceleni, ijika elithambile ekhoneni ngalinye. Kwakungekona ukwenqatshwa komklamo wabo, kodwa ukuhunyushwa kwakho ngolimi lwento esetshenziswayo. Umkhiqizo wokugcina wawumangalisa futhi uqinile, kodwa isinyathelo sokuqala kwakuwukulawula okulindelekile mayelana nokuthi lisho ukuthini 'isiko' emhlabeni obonakalayo.
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Esinye isendlalelo isibambo noma iknob. Kubonakala kuyinto encane, kodwa ukunamathiselwe kwayo kubalulekile. Ingabe i-clamp yensimbi, indandatho ye-silicone, noma i-polymer eboshiwe? Ngayinye inemithelela yemikhawulo yokushisa ephephile kuhhavini, ukuqina komshini wokuwasha izitsha, nokusebenza kahle komugqa wokuhlanganisa. Iklayenti lingase lifune ukubukeka kahle, kwengilazi yonke okunesibambo esiboshiwe, kodwa lokho kwethula into entsha ene-coefficient ehlukile yokunwetshwa kwe-thermal. Ingabe leyo bhondi izobamba ngemva kwemijikelezo engu-500 kumshini wokuwasha izitsha? Kuye kwadingeka senze isibonelo futhi sihlole lokhu kucacisiwe, ngezinye izikhathi okuholela ekuvumelaneni—njengokukhetha i-clamp yensimbi engagqwali yezinga eliphezulu, okuthi nakuba ibonakala, iqinisekise ukusebenza. I ikhava yengilazi eyenziwe ngokwezifiso akuyona ingilazi nje.
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Ukwehluleka kuyiphuzu ledatha lapha. Sake sazama ukwakha isivalo esine-steam edidiyelwe—inub yengilazi encane ebunjiwe enembobo. Umbono wawubuhle, izingxenye ezimbalwa. Ukubumba kwakuyinkimbinkimbi, futhi inqubo yokushisa yayilokhu ibangela ukuphuka okuncane eduze kwembobo yokukhipha umoya. Ngemva kwezinyanga, sayivala. Isixazululo esihle saba indawo ehlukile, enezinga lokushisa eliphezulu lokufaka umoya wepulasitiki. Kusifundise ukuthi kwesinye isikhathi, ikhambi elenziwe ngendlela oyifisayo kakhulu ingxubevange, esebenzisa izinto ezinhle kakhulu zezinto ezahlukahlukene. Ukuhlanzeka kombono kuvame ukuholela ekusebenzeni.
Nali iqiniso elinzima iziqalo eziningi noma izinhlobo ezincane ezingaliqondi ekuqaleni: eliyingqayizivele ngempela ikhava yengilazi eyenziwe ngokwezifiso ngokuvamile kudinga ukuthululelwa ngokwezifiso. Ngengilazi, lokhu ngokuvamile kusho isikhunta noma amafomu asetshenziswa ngesikhathi sokusika nokubunjwa. Lezo yizindleko ezibalulekile ze-NRE (Non-Recuring Recurring Engineering). Inkampani ekhiqiza izingcezu ezingaphezu kwezigidi eziyi-15 ngonyaka kungenzeka yehlise izindleko zamathuluzi ajwayelekile kuzo zonke izinhlobo zokukhiqiza. Uma ucela umumo omusha, ubacela ukuthi batshale imali kumathuluzi amasha wevolumu yakho, okungenzeka ukuthi encane. Lezi zindleko kufanele zifike endaweni ethile.
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Ukucacisa ingilazi ngokwayo kuyinkundla yezimayini yokuqagela. Sebenzisa ingilazi epholile yekhwalithi enhle ayisho lutho. Ingabe sikhuluma nge-soda-lime silicate? I-Borosilicate? Eyokuqala ijwayelekile ezivaloni eziningi zokupheka—iyathukuthela kahle, icacile, futhi iyonga. Eyakamuva, evame ukubizwa ngengilazi ye-borosilicate (cabanga nge-Pyrex endala), inokumelana nokushaqeka okushisayo okuphezulu kodwa kubiza kakhulu futhi kunzima ukuthukuthela kube yizimo eziyinkimbinkimbi. Iningi lokukhiqizwa kwevolumu ephezulu, njengezigidi zezingcezu ezivela ezisekelweni ezinkulu zokukhiqiza, zisebenzisa ingilazi ye-soda-lime yekhwalithi ephezulu, egcwele umoya ogcwele. Kungaphezu kokwanele izinhlelo zokusebenza zesivalo uma kuklanywe ngendlela efanele.
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