灯、风口等开孔尺寸要提前加工好。
Lamps, air vents and other openings to be processed in advance.
化学蚀刻的模板也可以成锥形，但是如果只从一面腐蚀，开孔尺寸可能太大。
Maybe the chemically etched can form the taper but the hole dimension maybe too big if only etch from one side.
结果表明：在开孔尺寸一定的情况下，随着板宽的增大，开孔损伤板的应力集中因数减小；
The stress concentration factor (SCF) decreased with the increase of the width of plates when the hole diameter was definite.
而且MT510 TV 5内置eb500档案转换程序，无需更改开孔尺寸即可完成500到8000软件功能的完美升级！
And MT510TV5 built EB500 file conversion process can be completed without changing the hole size from 500 to 8000 software features the perfect upgrade!
对于有限尺寸板内开孔的情形，文中用有限单元法来分析腰圆形孔口的应力分布和应力集中。
For the plates with finite dimensions, the finite element method is used to obtain the stress distribution and stress concentration around the ovaloid opening.
正电子素飞行时间谱能够无损地给出材料开孔的尺寸、方向、以及内部连通性等性质。
Positronium Time of Flight Spectroscopy (Ps-TOF) represents the properties about the pore size, direction and inner-connection in materials.
分析讨论了真空板芯材的泡孔尺寸、开孔率及真空度等因素对真空隔热板性能的影响并给出了试验结果。
The factors affecting its thermal performance such as the cell size, open cell ratio and vacuum pressure have been discussed and the experimental results have been reported.
针对串联随进战斗部中弹丸对预开孔靶的侵彻性能，基于经典的空腔膨胀理论解析模型，建立修正的空腔膨胀理论模型，对不同尺寸预开靶孔的弹丸随进性能进行了分析。
An analytical model for the penetration of a following kinetic energy projectile into concrete targets with pre-drilled cavities is developed based on a modification of cavity expansion theory.
针对串联随进战斗部中弹丸对预开孔靶的侵彻性能，基于经典的空腔膨胀理论解析模型，建立修正的空腔膨胀理论模型，对不同尺寸预开靶孔的弹丸随进性能进行了分析。
An analytical model for the penetration of a following kinetic energy projectile into concrete targets with pre-drilled cavities is developed based on a modification of cavity expansion theory.
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