Results show that the acoustic system of micro perforation plate can effectively reduce discharge noise.
试验表明，微穿孔板吸声结构可有效地降低排气噪声。
The results of this study can offer some perforation plate and acoustic absorbing body design reference materials for the acoustic engineers and architects.
本文的研究结果可为声学工程师及建筑师提供穿孔板和吸声体设计的参考资料。
Results There were 3 types of vessel elements, scalariform vessel, reticulated vessel and pitted vessel, the perforation plates were simple perforation plate.
结果茵陈蒿具有梯纹、网纹和孔纹3种类型的导管，穿孔板类型为单穿孔。
Methods The operation was performed with perforation or plate keratoplasty.
方法采用穿透性角膜移植术或板层角膜移植术。
In the range of incident velocities near to the perforation limit velocity (V50), this mechanism depends on thickness and interlaminar shear strength of composite plate.
在接近穿孔极限速度的入射速度(V50)范围内，这一机制依赖于复合材料板的厚度和中间层剪切强度。
Conclusion Mending the perforation of nasal septum by shifting the mucoperiosteal flap and perpendicular plate of the ethmoid bone under nasal endoscope is an effective method.
结论鼻内镜下双侧黏软骨(骨)膜瓣移位加筛骨垂直板是治疗鼻中隔穿孔的理想方法。
Plate heat exchanger in the process of use, whether plate deformation, crack, perforation, aging, cracking is still the gasket attack, all need timely replacement.
板式换热器在运用过程中，无论是板片发作变形、裂纹、穿孔，仍是垫片发作老化、开裂，都需求及时替换。
By observing and analyzing the craters, it was found that the perforation mechanism varied with properties of the armor steel plate.
观察分析弹坑形貌发现，装甲钢板材料力学性能的改变导致了穿甲机理的变化。
Moreover, fewer plate number and low perforation area lead to low acetonitrile recovery rate and treatment capacity.
塔板数和塔盘开孔率偏低，使乙腈回收率低、处理能力小。
Moreover, fewer plate number and low perforation area lead to low acetonitrile recovery rate and treatment capacity.
塔板数和塔盘开孔率偏低，使乙腈回收率低、处理能力小。
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