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mumapiaoyun:差動螺紋 (2013-07-30 20:27) %G*D0pE
yu-xuegang:改變AB鏡組的空氣間隔。 (2013-07-30 17:00) f55Ev<oOa
seaman:你覺得A和B的兩端螺紋不同 H1X6f7` 然后轉(zhuǎn)動中間的零件,可使A/B的相對位置發(fā)生變化? (2013-07-30 22:02) NZl0sX.:
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