单词	counterbore
释义	counterbore /ˈkaʊntəbɔː / noun 1A drilled hole that has a wider section at the top.In the new design, the holes are formed with a lead-in chamfer to facilitate pushpin insertion and a counterbore formed inside the hole that creates a shoulder to hold the pins in place.... A counterbore surrounds each rivet receiving opening in the flat bottom surface. This is followed by a two-pass drilling operation to produce the counterbore and the bolthole. 1.1A drill whose bit has a uniform smaller diameter near the tip, for drilling counterbores in one operation. verb [with object] Drill a counterbore in (an object): dies are counterbored to prevent material build-up... The end of the sleeve inside the mount was shortened and counterbored to accommodate the 0.16 NA beam. If the wood is thicker than three-fourths of an inch, you can either substitute longer screws or counterbore the interior surface of the door or drawer so that the screw head is recessed into the wood. It is an optional tiebar style with mounting holes drilled and counterbored for 1/4 inch SHCS.
随便看	post-classical post-classical Latin post-classicism postclavicle post-climacteric post-climax postclitic postclypeus post-coach postcode postcoded postcode lottery post-coenal post-coital post-coitally post coitum postcolonial postcolonialism postcolonialist post-coloniality post-Columbian postcolumellar post-communion post-communism post-communist

英语词典包含243303条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。