新型钻气孔机用于全自动造型线，设计采用自上而下、群钻气孔方式。该设计已获得国家专利。
Designed with a form as from top to bottom and group drilling set, a new type of drilling machine for air hole for automatic molding line has been awarded a national patent.
讨论了用虚拟技术对复杂金属切削刀具进行建模的问题，建立了麻花钻、群钻、齿轮滚刀的三维数字模型；
The paper research the problem of bow to build the model of cutter with the design technology of virtual product, and built the 3D models of twist drill, gang drill, gear hob;
戴卓群：一种内心的需要，开始往新媒体领域里面钻了。
Dai: Out of some kind of inner need, you began to move into the field of new media.
改造后的钻井帽先后用于旅大油田群2座平台的钻、完井作业，有效地降低了开发成本。
The modified drilling cap was used in the drilling and completion on 2 platforms in the cluster of LD oil fields, as a result that the development cost has been reduce effectively.
试验结果表明：自攻自钻螺钉群连接件具有“群体折减效应”。
The destructive mechanism of self-drilling screws connection is recorded in the test.
首先，对单颗自攻自钻螺钉连接件和自攻自钻螺钉群连接件进行了抗剪承载力试验研究。
The study's focus is describing the detailed results on bearing capacity of self-drilling screws connection by tests and numerical analysis. A more proper method is recommended.
首先，对单颗自攻自钻螺钉连接件和自攻自钻螺钉群连接件进行了抗剪承载力试验研究。
The study's focus is describing the detailed results on bearing capacity of self-drilling screws connection by tests and numerical analysis. A more proper method is recommended.
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