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counterbore [kauntə'bɔ:]
基本释义
- 埋头孔,沉孔,锥孔,镗阶梯孔,镗阶梯孔,镗孔,镗孔
英英解释
1个名词解释
- a bit for enlarging the upper part of a hole
[同] counterbore, countersink, countersink bit
- a bit for enlarging the upper part of a hole