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單項選擇題

客運專線60-42號道岔，轍叉軌排長度（）m。

A.46.19
B.47.992
C.49.192
D.53.199

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單項選擇題

客運專線60-42號道岔，導軌組件（2×5根）長度（）m。

A.46.19
B.47.992
C.49.192
D.53.199

單項選擇題

客運專線60-42號道岔，轉轍器軌排長度（）m。

A.46.19
B.47.992
C.49.192
D.53.199

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