求翻译：综上分析，绞刀在使用过久后被磨损,使其外径变小,所以用它对刀座进行绞孔时,会使得到的刀座孔径偏小. 孔径偏小的刀座与合铜装备后就会导致刀座开裂.是什么意思？

Foregoing analysis, the reamer wear after long use, so that the outer diameter smaller, so it knife reaming, will get the knife block aperture small aperture small knife block and cooperation copper equipment will lead to cracking of the tool holder.

On analysis, with the long sword was worn out, so that its outside diameter is small, so use it in the chuck of a hole, the knife will make the aperture diameter is small, the small knife equipped with copper, it will lead to cracking of the knife.

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Summing up the above analysis, Auger were worn after in use for too long, so that its diameter gets smaller, so when you use it to twist the knife hole will be across the aperture is small. Aperture is small knives and copper equipment leads to knife after cracking.

In the synthesis analyzes, the reamer after uses the long time to wear, causes its outer diameter to change small, when carries on with it to the tool apron reams, can cause the tool apron aperture is small. The aperture small tool apron after gathers the copper equipment to be able to cause the too