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【多选题】
两针齿间分梳作用的条件是 ______________和______________。A.
针齿平行配置
B.
针齿交叉配置
C.
一针面针尖迎着另一针面针尖有相对运动。
D.
一针面的针尖从另一针面针齿背上越过
E.
相对运动方向顺着对方针尖
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