金属钝气电弧熔接
SIGMA welding (MIG welding, Metallic Inert Gas Arc welding
电弧熔接接头机
arc fusion splicing machine
直接电弧熔接
direct current arc welding
金属惰性气体电弧焊
Mig welding
metal arc inert gas welding
金属极惰性气体电弧焊
inert gas metal arc welding
气体-气体热交换顺
gas-to-gas heat exchanger