2025-10-31 14:22 浏览次数 10
翻边端
扩口
the flared end is then drawn up by the tube nut so the inside surface is tightly secured against the ball seat of the fitting.
接着通过管道螺母将扩口端拔出使其内部表面与管件球座紧密结合。
possibly the oddest suggestion is that the universe is funnel-shaped, with one narrow end and one flared end like the bell of a trumpet.
有一种或许是最古怪的想法,那就是认为宇宙是漏斗状的,有着狭窄的一头和向外开展的一头,像是一个喇叭口。