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 Word History First Known Use 1937, in the meaning defined above
随便看	thought through thought transference thought up thought-out thought-provoking thought-read thought-reader thoughted thoughten thoughtful thoughtfuler thoughtfulest thoughtfuller thoughtfullest thoughtfullier thoughtfulliest thoughtfully thoughtfulness thoughtfulnesses thoughtless thoughtlesslier thoughtlessliest thoughtlessly thoughtlessness thoughtlessnesses

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