After the transformer has been delivered to site and any oil added, as may be necessary, the suppliers shall arrange for the oil to be tested for PCB content and a certificate issued to the Purchaser showing the PCB content.的翻译：正在翻译，请等待... 什么意思？中文翻译英文，英文翻译中文，怎么说？

在变压器被交付了到站点之后，并且所有油增加了，和可以是必要的，供应商将安排为了为PCB内容和证明能将测试的油被发行对显示PCB内容的采购员。