JIS M 6511-1962 Points and crossings for mine steel tub and locomotive《矿山钢矿车和机车用转辙器和岔道》.pdf

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JIS M6511-1962 矿山轨道用转辙器.pdf

DIN 20537-1992 Switches for simple track points 120 m radius 1 9 inclination 900 mm gauge《简易道岔用转辙器 半径120m 坡度1 9 轨距900mm》.pdf

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