perforation

Clinical application of ovarian drilling technique under laparoscopy in treatment of PCOS;

腹腔镜下卵巢打孔术治疗多囊卵巢综合征

Illumined by Shortest Path Algorithm,the paper proposes a genetic algorithm to solve the path optimization in the drilling of PCB.

将遗传算法求解TSP(TravelingSalesmanProblem)问题的方法应用于印制板打孔工艺的最优路径选择中,根据印制板上孔的位置找出打孔的最短路径,实现高效率打孔。

The study gives insight into dynamic process of micro-waterjet guided laser drilling process, analyzes the heat transfer and flow structure based on the thermal physics and flow dynamics.

本文研究微水射流导引激光束精密打孔的动力学过程,着重从工程热物理和流体力学的基础出发对此过程中的传热及流动现象进行理论分析,首次采用Finite Volume Method(FVM)方法建立了描述其间的物理过程的数值模型。

Laser perforating technology of tipping paper;

水松纸激光打孔技术研究

Laser perforating system in scanning is widely used to perforate some thin nonmetal material, such as paper, leather and plaster, and so on.

激光扫描打孔系统广泛用于非金属薄型材料(如纸张、皮革、膏药)的加工,其结构简单、可靠,打孔效率高,打出小孔密集、整洁。

Effects of perforation and fertilization on the turf quality of Kentucky bluegrass;

打孔和施肥处理对草地早熟禾草坪质量的影响

As the one-pulse energy is raised, the number of pulses required for one perforation increases rather than drops at two one-pulse energy values, 85mJ and 181mJ.

利用纳秒激光在薄铜片上进行多脉冲打孔时 ,出现一种反常现象 ,在 2个值处 ,随着单脉冲能量的提高 ,打 1个孔所需脉冲次数不但没有减少 ,反而增加 ,根据环境气体分解消耗激光能量解释了第 1处的反常现象 ,并首次提出了等离子体受光场力的作用 ,在激光作用初期 ,使靶表面形成一层致密的等离子体 ,阻挡了后续激光到达靶材 ,引起了第 2处的反常现

To use a punch or use a punch on.

使用打孔器或用打孔器在…上打孔

boring machine for making drill holes in rock or coa

在岩石或煤上打孔用打孔机

Perforator: Key board which produces prunched paper tape.

打孔机:把纸带打孔的键盘。

A hole or passage made by or as if by use of a drill.

钻孔，打洞用或似用钻打孔或通道

Register punch: Precision punching device used in a punch register system.

定位打孔机:应用于打孔定位系统内的精密打孔机。

To make a hole in (a hard material) with a drill

用钻头在(硬材料)上打孔.

To check the results of keypunching.

检查击键打孔的结果。

Telegraph cable paper for punching

GB/T7972-1987打孔电报纸

ectrospark perforating electrode tube

高速电火花打孔电极管

drift ,riveters', of base metal

铆工用打孔器,贱金属制

He makes a small hole in the belt with a leather punch.

他用打孔器在皮带上钻了一个孔。

He make a small hole In the belt with a leather punch

他用打孔器在皮带上钻了一个孔

A tapered steel pin for enlarging and aligning holes

打孔器用来扩大或调整孔洞的尖钢针

To make a hole or opening in;perforate.

穿孔于，打眼于在…里做一个洞或口子，打孔于

Perforatig rules: Steel rules which has a series of cuts for perforating sheet of paper.

打孔线:有着一串切口，用来在纸上打孔的钢线。

To pierce or stamp with rows of holes, as those between postage stamps, to allow easy separation.

打或印一排孔，如在邮票上打孔使之易被撕开

Punching is done with a special punch-register device.

打孔是用一种专用的打孔定位装置进行的。

I used a3- hole punch to punch some papers.

我用了一个打孔器在一些报告上打洞。