C,. Incomplete fusion prevent adopting greater welding current, use correctly to weld the cleaning of operating, notice groove position.
未熔合的防止采用较大的焊接电流，正确地进行施焊操作，注意坡口部位的清洁。
Pre-cleaning should include the removal of metal filings and weld splatter: both are potential sources for dirt in phosphate and electrocoat.
预清洗系统包括清除金属屑及焊渣，它们是磷化和电泳槽内的污染物的来源。
Pre-cleaning should include the removal of metal filings and weld splatter: both are potential sources for dirt in phosphate and electrocoat.
预清洗系统包括清除金属屑及焊渣，它们是磷化和电泳槽内的污染物的来源。
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