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mumapiaoyun:差動(dòng)螺紋 (2013-07-30 20:27) =rZ'!Pa
yu-xuegang:改變AB鏡組的空氣間隔。 (2013-07-30 17:00) >P@VD"U
seaman:你覺得A和B的兩端螺紋不同 /D&&7;jJ 然后轉(zhuǎn)動(dòng)中間的零件,可使A/B的相對位置發(fā)生變化? (2013-07-30 22:02) Mqr_w!8d
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