求翻译：吴先生说德国工程师目前正在检测产品磨具阶段，然后才能开始PCB检测阶段，因为磨具投资大，所以用时比较长，估计要6月中旬才能开始PCB阶段，是什么意思？

Wu said that the German engineers are currently testing products abrasive stage, before starting the the pcb detection stage, because the abrasive big investment, so long used, it is estimated to be in mid-June to begin pcb stage

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Mr. Wu said German engineer is examining the product grinding tool stage at present, then can start the PCB examination stage, because the grinding tool invests in a big way, therefore with time quite is long, estimated wants mid-June to be able to start the PCB stage,

He said Germany engineers are currently testing tools product stage, before starting the PCB testing phase because Abrasives investment, so long unavailable, estimates should start in mid-June to stage of PCB,

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