mask welding
... plate-welded spiral case钢板烧焊蜗壳 mask welding电焊眼罩 hard-welding硬质合金熔焊 ...
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翻译当你在看电焊的火花时候一定要戴上护眼罩。
You must put on an eye-shield when you are looking at the welded sparkle.
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