英语词汇“backing ring”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	backing ring
释义	backing ring noun : a metal ring used inside a butt-welded joint to reinforce the joint and to prevent weld metal from entering the pipe at the joint
随便看	otitis otitis externa otitis media oto oto- oto otobius otocephalic otocephaly otoconial otoconium otocyon otocyst otocystic otodectes otodectic otodectic otodectic mange otoe otogenic otogenous otolaryngological otolaryngologist otolaryngology otolite

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