軌鏠調整之目的為何？(A)提供鋼軌溫度伸長之餘裕 (B)提供鋼軌溫度收縮之餘裕(C)提供鋼軌溫度伸縮之餘裕 (D)提供鋼軌軸重之餘裕。

問題詳情

50.軌鏠調整之目的為何？
(A)提供鋼軌溫度伸長之餘裕
(B)提供鋼軌溫度收縮之餘裕
(C)提供鋼軌溫度伸縮之餘裕
(D)提供鋼軌軸重之餘裕。

參考答案

答案：C
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