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自由弯形时,坏料与模具之间的接触是()。
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自由弯形时,坏料与模具之间的接触是()。
A、点接触
B、线接触
C、面接触
D、线、面接触
时间:2021-12-29 17:11
关键词:
铆工(初级)
冷作钣金工
答案解析
B
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