Welding flux backing
[化] 焊剂垫
🧩 词语组成解析
a. 焊的\\n[机] 熔接, 焊接, 锻接
backing
[['bækiŋ]]
n. 后退, 衬背, 后援, 支持者\\n[化] 衬垫
🗣️ 情景例句
555-7700. 555 7700
555-7700. 555 7700
Liberty often degenerates into lawlessness.
自由随便，经常堕落到无法无天。
It is hard for us to realize nowadays how difficult it was for the pioneers.
我们今天很难想像昔日的登山先驱们是多么艰苦。