... tunnel recess 沟槽;轴隧尾室;鹅颈暗槽 tunnel recess 轴隧端室 tunnel screw propeller 隧道螺旋桨 ...
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... shaft-alley escape 轴隧应急出口 shaft alley recess 轴隧端室 screw shaft alley 地轴弄 ...
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短语
轴隧端室肘板
tunnel recess bracket
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