单项选择题
A.5X10X55mm B.7.5x10x55mm C.7x10x55mm D.10x10x55mm
A.45°±2° B.45°±1° C.44°±1° D.以上均不是
A.7±0.05mm B.7.5±0.05mm C.10±0.05mm D.以上均不是
A.10x10x55mm B.7x10x55mm C.5x10x55mm D.以上均不是
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