标准查询 标准查询焊料.试验方法.角焊中焊料定位能力和根部焊透层的分类试验
Welding consumables. Test methods. Classification testing of positional capacity and root penetration of welding consumables in a fillet weld
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标准查询Welding consumables. Test methods. Classification testing of positional capacity and root penetration of welding consumables in a fillet weld
