精孔
精孔
印制电路板(PCB)数控钻床是印制电路板精密孔位加工关键的工艺装备。
The problem that the position of the bolt hole for reserving the equipment foundation is not precise in the process of casting concrete in prior art, and the template is hard to detach is solved.解决了现有技术中存在的在混凝土浇筑过程中预留设备基础的螺栓孔洞的留设时位置不准确,模板拆除难的问题。
Through the qualitative test and performance test, it proved that the double hole can be used in precise seeding for tillering crop (such as wheat).通过定性试验和性能试验,论证了复式型孔能够用于分蘖作物(小麦)的精量播种。