求翻译：关于200件镁阳极产品招标，我已发送文件到至少6家制造商，目前看几乎没有公司生产过这种带PVC座的阳极（双瑞公司除外，但他们不愿意参与阳极的投标）。同时与CORROCO和双瑞公司进行了联系。是什么意思？

Bidding on the 200 magnesium anode, I have to send the file to at least six manufacturers, the moment almost no production this with pvc seat anode (except for dual Rui, but they do not want to participate in the anode tender). Contact with corroco pairs Rui.

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About 200 magnesium anode product tender, I have transmitted the document to at least 6 manufacturers, at present looked does not have the company to produce this kind nearly to bring the PVC place anode (double auspicious company to be an exception, but they are not willing to participate in anode

About 200 pieces of magnesium anode products tender, I have sent a file to at least 6 different manufacturers, at present almost no company produced such an anode with PVC (except double Swiss company, but they are not willing to participate in the anode of the tender). At the same time with two COR