1) perforation plate of vessel
导管穿孔板
2) punching template
穿孔导板
3) punching track
穿孔导轨
4) Microperforated panel
微穿孔板
1.
Using transfer matrix method to analyze microperforated panel absorber s acoustic characteristic;
用传递矩阵法分析微穿孔板的声学特性
2.
The possibility and the significance of replacing fibred absorption materials by fibreless materials,especially by microperforated panels,are discussed.
简要地介绍了吸声材料的基本特点，阐述了无纤维性吸声材料（特别是微穿孔板吸声结构）取代传统的纤维性吸声材料的可能性及其重要意义，较详细地介绍了近年来德国以及我国科研人员在无纤维吸声材料研究上所取得的进展。
3.
A calculating program of microperforated panel construction is worked out in this paper.
文中编制了微穿孔板结构的数值分析程序，通过计算实例，对微穿孔板结构的声学特性进行了探讨。
5) Perforated panel
穿孔板
1.
Acoustic properties of perforated panels closely pasted with an absorptive thin layer;
穿孔板背面紧贴吸声薄层时的声学特性
2.
Experimental study on improving absorbing property of perforated panel;
提高穿孔板吸声性能的实验研究
3.
Theoretical analysis and calculation on the acoustic properties of perforated panel absorber were described herein.
对穿孔板吸声结构的声学特性进行了理论分析与计算。
6) micro perforated panel
微穿孔板
1.
Based on theory about micro perforated panel,a micro perforated panel muffler was developed to meet the requirement of the pneumatic motor in roofbolter.
在微穿孔板消声理论的基础上 ,根据气动马达消声器的实际需要设计了一种微穿孔板消声器 ,并通过实验对这种消声器的消声特性和流阻进行了研究。
2.
In this paper, based on Maa's theory, the theory of micro perforated panel(MPP) absorber is summarized, a comparison between the calculated result and the testing result for intermediate and lower frequency standing wave tubes is made.
微穿孔板吸声结构具有吸声系数高、吸收频带宽等优点 ,广泛应用于噪声控制的各个领域 根据马大猷的微穿孔吸声理论 ,总结了微穿孔板吸声结构的吸声原理 ,并用基于此理论的计算结果与在低频、中频驻波管中实验的结果进行对比 ,得到了比较满意的结果 采用微穿孔板吸声结构 ,进行汽车发动机隔声降噪模拟实验 ,结果表明 ,微穿孔板吸声结构具有良好的降噪功能 微穿孔板吸声结构的吸声性能的初步研究 ,为微穿孔板吸声结构在工程中的应用提供了依
补充资料：成都无缝钢管厂管坯在菌式穿孔机上穿孔
成都无缝钢管厂管坯在菌式穿孔机上穿孔
成都无缝钢管厂管坯在菌式穿孔机上穿孔
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条