常见例句双语例句When the nut is screwed to the valve threads, it pulls the nipple into the valve outlet compressing the washer between the two beads.当螺母拧到阀门螺纹上时,它把管接口推进阀门排气口,压缩在两个垫珠之间的垫圈。www.airproducts.com.cn 返回 screwed nipple