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| welding bell (炉焊管生产用); forming bell (炉焊管生产用); welding gutter | |||
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| bell (炉焊管生产用: This ensures that the agitated surface of the steel bath is confined to the area underneath the bell. 这就保证了将钢水池的搅拌面局限于钟形隔离罩下方的区域。) | |||
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| welding bell | |||
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