问答题

拉深比

答案：正确答案：平面毛坯直径与拉深后圆筒的直径的比值。

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多项选择题

International Federation of Accountants (IFAC)work done through its ( ). A.
standard-setting boards B.
standing committees C.
Public Interest Oversight Board D.
IFAC council

β破裂

答案：正确答案：因材料局部延伸率不足引起的破裂。