Integral cast iron dished heads
... 整体铸造法：integral casting 整体铸铁碟形封头：Integral cast iron dished heads 整体小齿轮：integral pinion gear ...
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integral cast iron dished head
... hemispherical head 半球形封头 integral cast iron dished head 整体铸铁碟形封头 jacket head 夹套封头 ...
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