单项选择题
A.0.01~0.02mm B.0.1~0.2mm C.1~2mm
A.C2R B.U65 C.C680S D.U86FN
A.70mm B.72mm C.75mm
A.存油间隙 B.热胀冷缩的余地 C.装配误差的调整量
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