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【多选题】
下面关于外螺纹参数测量和确定方法叙述正确的是A.
可以先测量出大经和螺距，然后查表确定螺纹类型、大经和螺距
B.
可以先测量出大经、螺距和牙型角，然后查表确定螺纹类型、大经和螺距
C.
可以先测量出螺距和牙型角，然后查表确定螺纹类型、大经和螺距
D.
可以先测量出大经、螺距和牙型角，然后直接采用测量值即可
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handed down
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How to survive; are
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