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Flange hole inside the tube must be chamfered hole welding.
法兰内孔管件内孔必须倒角焊接。
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