gravity ram重力回程柱塞
gravityn.重力;庄重;严重;严肃
gravity tectonics重力构造
gravity quay wall重力式码头岸壁,重力式岸壁
gravity type pawl重力式爪
gravity dump body自重倾卸车身
gravity electrode重力焊条
gravity surveying重力测量
gravity placement重力充填
gravity flowsheet重力选矿流程
gravity switching重力调车,驼峰调车
gravity excursion重心偏移