... emergency stop valve 危急遮断阀, 紧急止流阀, 主汽门 emergency vent valve 紧急放风阀 empty and load valve 空重车转换阀 ...
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locomotive emergency vent valve 机车紧急放风阀
emergency vent valve detail 紧急放风阀
emergency stop valve vent 应急用排气孔
emergency stop valve vent valve 紧急放风阀
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