UID:288349
图片:1.png
UID:47595
UID:213480
mumapiaoyun:差动螺纹 (2013-07-30 20:27) Z,~"`9>Ss
yu-xuegang:改变AB镜组的空气间隔。 (2013-07-30 17:00) qL^}t_>
seaman:你觉得A和B的两端螺纹不同 )F? 57eh 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) (W+9 u0Zq
UID:284866
UID:94256
UID:289200