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