单项选择题
后挡护缘内径直径为()
A.189+0.305+0.145mm
B.190+0.305+0.155mm
C.191+0.305+0.145mm
D.190+0.305+0.145mm
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单项选择题
A.189+0.305+0.145mm
B.190+0.305+0.155mm
C.191+0.305+0.145mm
D.190+0.305+0.145mm
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