试题与答案

为了保证矫直质量,辊式钢板矫直机至少有()工作辊。 A.3个 B.7个 C.23~2

题型:单项选择题

题目:

为了保证矫直质量,辊式钢板矫直机至少有()工作辊。

A.3个

B.7个

C.23~29个

答案:

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