bottom bolster

网络释义

1.	下承梁 http://www.ptsgi.com/chinese... ... "下弦材"," Bottom chord member" "下承梁"," Bottom bolster" "下降窗"," Drop window" ... www.guandang.com
2.	摇枕 bolster ... truck bolster 转向架承梁 bottom bolster 摇枕 box section bolster 箱形断面摇枕 ... dict.yqie.com

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