单项选择题
铁路冻害地段使用的道钉有()长四种。
A.205.230.255.288mm
B.200.205.230.255mm
C.205.240.235.288mm
D.205.230.260.288mm
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单项选择题
A.205.230.255.288mm
B.200.205.230.255mm
C.205.240.235.288mm
D.205.230.260.288mm
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