Back welding
[化] 封底焊
🧩 词语组成解析
back
[bæk]
n. 背，背部;背面，反面;后面，后部;（椅子等的）靠背;
vt. 使后退;支持;加背书于;下赌注于;
vi. 后退;倒退;
adj. 背部的;后面的;以前的;拖欠的;
adv. 以前;向后地;
a. 焊的\\n[机] 熔接, 焊接, 锻接
🗣️ 情景例句
You'll see a stop sign.
会看到有个停车再开标 。
Had so much fun
玩得开心
Television cameras and newspapers carried the news to everyone in the country.
电视摄像机和报纸把消息传送到全国。