单项选择题
A.0.24mB.0.26mC.0.28mD.0.30m
A.0.22〜0.28mB.0.24〜0.30mC.0.34〜0.42mD.0.45〜0.48m
A.抗压B.抗拉C.抗扭D.抗裂
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