求翻译：4mm孔将会被机加工成M6孔，铸造时为保证两端螺孔同心，我们在此放置芯棒，为了增加强度直径增加为5mm,该尺寸不会影响最后成品尺寸M6.是什么意思？

4mm holes will be machined to m6 hole, casting in order to ensure both ends of the screw holes concentric mandrel placed in this increase, in order to increase the intensity diameter is 5mm, the size does not affect the final product size m6.

4mm holes will be machined into a 6-hole, casting M when both ends to ensure that the holes in this place, we work together-stick, in order to increase strength increased to 5 mm diameter, the size does not affect final product size M 6.

The 4mm hole will be able becomes by the machining the M6 hole, when the casting for the guarantee both sides spiral hole concentric, we in this laying aside core rod, in order to the gain in strength diameter increase will be 5mm, this size will not be able to affect final finished size M6.

4mm will be processed into the M6 hole, screw holes on both ends to ensure concentric when casting, we drop rods, in order of increasing strength increases 5mm in diameter, the size does not affect the final product size M6.

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