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Don't after welding still perfect?
难道焊接后仍完美吗？
youdao
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The long neck flange should have stress-relief heat treatment after welding.
拼接法兰应进行焊后消除应力热处理。
youdao
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The long neck flange should have stress-relief heat treatment after welding.
拼接法兰应进行焊后消除应力热处理。
youdao