皮皮学，免费搜题
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【单选题】
低碳钢搭接缝焊根据使用目的和用途可采用高速、中速和低速三种方案。手动移动工件时,为便于对准预定的焊缝位置,多采用( )。
A.
低速
B.
中速
C.
高速
D.
以上均可
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