單項(xiàng)選擇題預(yù)鋪道岔卸車時(shí),軌件和地面間應(yīng)鋪墊緩沖襯墊,每層用緩沖襯墊墊實(shí)墊平,緩沖襯墊應(yīng)按高度方向垂直對(duì)齊設(shè)置,長度超出組件邊緣不少于()

A.50mm
B.100mm
C.150mm
D.200mm


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