常见例句雙語例句When the nut is screwed to the valve threads, it pulls the nipple into the valve outlet compressing the washer between the two beads.儅螺母擰到閥門螺紋上時，它把琯接口推進閥門排氣口，壓縮在兩個墊珠之間的墊圈。www.airproducts.com.cn 返回 screwed nipple