本衬垫适用于各种球扁钢对接接头CO2气保护单面焊用。

This backing is uesd for CO2 one-side welding of bulb steel.

youdao

本衬垫适用于各种球扁钢对接接头CO2气保护单面焊用。

This backing is uesd for CO2 one-side welding of bulb steel.

youdao