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	sawlog sawman sawmill sawmiller sawmilling sawn sawn sawney sawny saw palmetto sawpit saws saw-scaled viper saw set sawsetter saw shark saw sharpener sawsharper sawt saw table saw through and through sawtimber sawtooth sawtooth sawtooth building

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