1.Nws yog siv los ua cov foob pob hluav taws liab, cov teeb liab foob pob hluav taws, cov raj nplaim, tsom iav reagents, iav kho qhov muag, kua siv lead ua iav substrate, aerosol hluav taws tua hluav taws thiab lwm yam hluav taws kub reagents.
2.Nws yog siv los ua cov khoom siv cathode ntawm lub tshuab nqus tsev vacuum hauv kev lag luam hluav taws xob, lub tsheb airbags thiab qib high-qib pigments.
