bell hole
... bell hole welding 坑内焊接 bell hole 焊接坑 bell housing 屏蔽套 ...
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坑内焊接 bell hole welding
坑内焊接工 bell-hole welder
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设有收弧功能，粗焊丝焊接后，松开枪头微动开关，送丝与电弧电压自动衰减填满弧坑。
It has ending arc function, after the welding of thick welding wire, loosing sensitive switch, the voltage of arc and welding torch.
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