问题
单项选择题
点焊机通常气压规定在0.3～（）MpA范围内。
A、0.5
B、0.8
C、1.0
答案
参考答案：A
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点焊机通常气压规定在0.3～（）MpA范围内。
A、0.5
B、0.8
C、1.0
参考答案：A
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