According to the production of superhigh strength welded steel pipe during recent years in Japan,a new cold rolling steel strip has been developed and produced.

 
  • 根據日本在最近幾年來(lái)生產(chǎn)超高強度電焊管的情況,已經(jīng)開(kāi)發(fā)和生產(chǎn)出新的冷軋鋼帶。
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