A tool for countersinking: see the verb.
| 单词 | θ212278 | 
| 释义 | society > occupation and work > equipment > piercing or boring tools > 			[noun]		 > tools for enlarging holes > countersink (3)		 countersink1815 A tool for countersinking: see the verb. countersinker1881 (a) a tool for countersinking; = countersink, n. 1; (b) one who operates a countersinking machine. counterbore1939 = countersink, n. 1 2.  | 
	
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