方凿圆枘

Explanation: Chisel: mortise; tenon: tenon. Square tenon does not fit gouge. Metaphor out of tune, can not be matched. 　　Source: Warring States Chu Song "Nine identified" gouge the square tenon Come, I know these disagreements and hard into the solid. " 　　Examples: However, miscellaneous take "ram" "Gu Liang," to address "Tso", which was to crown two-sandals will be integrated hemp silk, ~, which may call into? (Tang Kong Yingda "Spring and Autumn just order")