1. Ukwakheka kwamakhemikhali kuyi-silica engasebenzi, futhi akukho ukukhathazeka ngokuphazanyiswa komsebenzi wamakhemikhali;
2. Izinhlayiya eziyindilinga nokunwebeka. I-Impact resistant, ingasetshenziswa ngokuphindaphindiwe
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7. I-workpiece ecutshunguliwe inomphumela we-matt, igqamisa umbala wensimbi, ayigqwali, njll., futhi ayidingi ukucwiliswa nokufekethiswa.
