單項選擇題

修理臨修故障時,轉(zhuǎn)K2、轉(zhuǎn)8B、轉(zhuǎn)8AB、轉(zhuǎn)K1、轉(zhuǎn)8AG、轉(zhuǎn)8G、轉(zhuǎn)8A型轉(zhuǎn)向架使用鋼質(zhì)或竹質(zhì)墊板,竹質(zhì)墊板厚度不大于()

A.25mm
B.30mm
C.40mm
D.60mm

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