... Electronic industry, Petro-gas & Oil field, Chemicals & Petro-chemicals, Coal-mine, Metallurgy, Pharmacy, SMT, Fire-resistance, lab, Air ... and new material industries: For chemical material gas, pipeline blowing, gas replacement, gas protection, product transport, etc. Used in ... supervision and control. 10. Professional technologies ensure reliable gas supply. 11. Friendly human-machine interface. 5, ...