UID:288349
图片:1.png
UID:47595
UID:213480
mumapiaoyun:差动螺纹 (2013-07-30 20:27) pB5#Ho>S
yu-xuegang:改变AB镜组的空气间隔。 (2013-07-30 17:00) lG5KZ[/Or
seaman:你觉得A和B的两端螺纹不同 Hy5 6@jW+E 然后转动中间的零件,可使A/B的相对位置发生变化? (2013-07-30 22:02) _Wq;bKG
UID:284866
UID:94256
UID:289200