冲钉 meaning in Chinese

drift pin

Metal chisels , punches , and drift pins : safety requirements
金属凿凿孔机和冲钉:安全要求
Hand tools - metal punches and drift pins - safety requirements
手工工具.金属冲头和尖冲钉.安全要求
Metal chisels , punches , and drift pins
金属凿冲床和冲钉
In joist ' s temporary fixation , if temporary bolt and drill nail are used , amount of them should be calculated as flowed specification : the amount should be no less than 1 / 3 of all holes ; at least , two temporary bolts should be used ; amount of drill nail should be no more than 30 % of temporary bolts bolted ( grade a , grade b ) hole shouldn ' t be fixed with drill nail
桁架临时固定如需用临时螺栓和冲钉，则每个节点处应穿入的数量必须由计算确定，并应符合下列规定：不得少于安装孔总数的1 / 3 ；至少应穿两个临时螺栓；冲钉穿入数量不宜多于临时螺栓的30 % ；扩钻后的螺栓（ a级、 b级）的孔不得使用冲钉。