Terms for subject Plastics containing Gravity

English	Chinese
gravity casting	重力浇铸〈无压力浇铸〉
gravity closing	重力闭合〈活塞依靠自重闭合〉
gravity feed	重力供料〈自然下落供料〉
gravity roller conveyer	重力式滚轴传送装置
gravity segregation	重力分离
gravity test	相对密度测定
specific-gravity bottle	比重瓶
specific-gravity bottle	密度瓶