The method of blow, side protecting gas in laser deep welding is used to reduce the electronic density of plasma, also, the active flux in TIG can absorb electron.
激光深熔焊中侧吹保护气体方法用于降低等离子体中的电子密度抑制等离子体，TIG中活性焊剂也有吸收电子的作用。
The present invention relates to the method of eliminating internal rust stains and scales of and coating wall protecting paint to water pipe, gas pipe and oil pipe.
高压气、水管道除垢及护壁方法，涉及对供水管、给水管、煤气管、输油管清除管内的锈斑和结垢和涂覆护壁涂料的方法。
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