Iimbonakalo
1 Ukusebenza okugqwesileyo kokhuseleko.Kuyafana neglasi epholileyo, xa iglasi yophukile, iya kuqhekeka ibe ziingceba eziqinileyo, kwaye iqhekezwe ibe ngamaqhekeza amancinci angenabungozi, inokukhusela abantu ekwenzakaleni.
2 Ukumelana noxinzelelo lomoya olungileyo.Iglasi egobileyo egobileyo inokumelana noxinzelelo lomoya olungcono kunolunye uhlobo lweglasi, ngenxa yemilo yayo ekhethekileyo enomgangatho obalaseleyo.
3 Ukumelana nempembelelo ephezulu.Iglasi egobileyo egobileyo inomsebenzi wamandla aphindwe ka-4 kuneglasi eqhelekileyo.Inkqubo yokufudumala iphucula amandla eglasi, iyenza ivelele ekuchaseni impembelelo.
4 Ukumelana kakuhle nokothuka kwe-thermal.Iglasi egobileyo egobileyo inokuhlala yonakele phantsi kotshintsho lobushushu malunga ne-200 ℃, ingcono amaxesha ama-3 kuneglasi eqhelekileyo.