已经有次观看 jwm在2015-10-28发布

Channel：Tungsten 标签： New  type  of  Tungsten  carbide  alloy  chamfer  cutter 

简介：Economic drill the countersink. A kind of to economic conical counterbore drill, also some people call it: the countersink. Other name (chamfering knives, chamfering) English name Countersink. Mostly will be required for processing of blank face with economic knife flat, especially for the plane of bolt connection, in order to make the bolt perpendicular to joint surface, need to put economic flat bottom of the hole, this is called dimpling.