单项选择题
A.相平行 B.相垂直 C.成45°角 D.成60°角
A.0.010~0.040mm B.0.016~0.060mm C.0.025~0.010mm D.0.040~0.160mm
A.3g B.5g C.8g D.10g
A.0.095~0.195mm B.0.20~0.40mm C.0.23~0.46mm D.0.26~0.53mm
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