... 木枕削平机 wooden sleeper adzing machine 木枕预钻孔 preboring of wooden tie 木枕钻孔机 wooden tie drilling machine ...
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... 木枕防腐 preservation of wooden tie 木枕预钻孔 preboring of wooden tie ； preboring of spike holes 木枕刻痕 incising of wooden tie ...
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