At the bottom of this plate, an aperture had been pierced exactly similar to the orifice of a letter box.
在那铁皮的下方，开了一个口，和信箱的口完全同一样。
The experimental results show that acoustic resistance of perforated plate is related to plate thickness, aperture diameter, numbers of aperture, acoustic frequency and airflow velocity.
研究表明：穿孔板的声阻与孔板厚度、孔径、穿孔数目、声波频率和气流速度等因素有关。
The stability and the precision of adjustment of large aperture servo reflector in laser system for nuclear fusion can be distinctively improved by using cross spring-plate shore.
采用十字簧板支承可有效提高激光核聚变光路系统中的大口径伺服反射镜的稳定性和可调节性。
The locking plate includes a first aperture capable of receiving a hook extending from a pump head, a second aperture capable of receiving a drive shaft of the pump head, and a release member.
锁紧板包括第一孔、第二孔和释放元件，其中第一孔能够接收从泵头伸出的钩，第二孔能够接收泵头的驱动轴。
The diffraction phenomena by a circular aperture or a phase plate is analyzed by the boundary diffraction wave theory, the analytic expression of its axial intensity is obtained.
本文根据边界波衍射理论分析了圆孔及相位片的衍射现象，得出其轴上光强的解析表达式，并对高斯光束经相位片衍射后的轴上光强进行了数值计算和讨论。
Obtained the guide rail plate aperture bevel edge and the travel angular speed theoretical curve;
得到了导轨盘开口倒角和行驶角速度的理论曲线；
A direction control plate is fitted near an exhaust aperture of a lamp unit, and a partition plate is fitted so as to surround the front and the bottom of the exhaust aperture.
本发明提供一种结构：方向控制板安装在灯单元的排气口附近，且隔板安装成围绕排气口的前部和底部。
A direction control plate is fitted near an exhaust aperture of a lamp unit, and a partition plate is fitted so as to surround the front and the bottom of the exhaust aperture.
本发明提供一种结构：方向控制板安装在灯单元的排气口附近，且隔板安装成围绕排气口的前部和底部。
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