| Description | Oxygen most widely distributed in nature, accounting for 48.6 percent of the earth’s crust by mass, is the most abundant element. For chemical and smelting strong oxidant, manufacturing water gas and natural gas, low-temperature oxidation of LPG, welding and cutting metal, rocket engines, oxygen breathing apparatus, air purification, liquid oxygen explosives, refrigerants, dyes, semiconductor manufacturing, plasma etching , oxidation, diffusion, chemical vapor deposition, standard gas, calibration gas, calibration gas, zero gas, online meter standard gas, medical gas, the preparation of optical fiber. |
