follow-up pulley从: follow动滑轮: fall block; movable block随动轮 从动滑轮 从动轮: follow-uppulley动滑轮: [机械工程] fall block; movable block从动滑油泵: secondary lubricating pump下载手机词典可随时随地查词查翻译关注微信公众号:chachacidian,回复:从动滑轮,即可在微信中查询翻译