In view of cost , practicability and maneuverability , the special sintering diamond trepanning drill was developed for drilling ceramic composite components originally 根据复合构件加工中的各种缺陷，分析了采用预压应力钻削对改善表面加工质量的重要性。
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Accoding to experiment , found that trepanning can obtain the holes of little taper , high roundness , using laser drilling of nearby the last energy threshold gained the holes of high quality 最终得出:在工件上打大孔径的孔时,采用旋切打孔的方法可以得到了圆度高、锥度小的孔质量。
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Methods : clinical data of 32 cases of patients with complicated posterior urethral stricture treated by the trepanning appliance and the 21 cases by common operation were retrospectively reviewed 方法：在对32例复杂性后尿道狭窄患者行开放性手术中，使用后尿道钻孔器钻孔（钻孔器组） ，并与21例常规后尿道钻孔的疗效进行对比。
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This laser poss characteristic : t he output power attains 500w ; laser energy instability less than 2 % ; laser radiation angle : about 3 . 5mrad . design a sort of new - style laser cutting head , using this equipment can carry out trepanning and percussion drilling processing 这台激光器所达到的参数为:输出功率达到500w ;激光能量不稳定度: < 2 % ;激光的发散角: 3 . 5mrad 。
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I used to work him so with my socratic method , and had trepanned him so often by questions apparently so distant from any point we had in hand , vet by degrees leading to the point , and bringing him into difficulties and contradictions , that at last he grew ridiculously cautious , and would hardly answer me the most common question , without asking first , " what do you intend to infer from that ? 我常用苏格拉底法和他争辩，常使他陷入圈套，起先我以离主题甚远的问题来回答他，接著一步步地引到主题，遂使他陷于窘迫或矛盾，直到后来他产生一种可笑的心态，这种普通的问题也不难于回答，先要问我，这句话你要困窘我到什麽程度呢？
