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UO 成形扩径
met.
U-ing, O-ing & expansion
(【技】采用 U 成型机和 O 成型机成形,使用机械或水压扩管,是生产大口径直缝电焊管的主要方法。)
成形扩径
:
3 phrases
in 1 subject
Metallurgy
3
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