常见例句雙語例句Unscrew the Allen screw in the middle of valve cap and lift up the cap just enough to pick up the old diaphragm.鏇松閥帽中間的內六角螺絲，竝且提起閥帽，正好足夠拿走舊閥膜。www.instrument.com.cn 返回 screw lift valve