1.
The Influence of Pore's Media on Sound Absorption Characteristics of Thick Microperforated Panel
孔中介质对厚微穿孔板吸声性能的影响
2.
Design and Research on the Transparent Absorbing Structure of Microperfrated Panel;
通透微穿孔板吸声结构的设计及研究
3.
The Mode Analysis and Position Selection of Perforated Panel Absorber
穿孔板吸声结构模态分析及位置选择
4.
" Test sieves--Metal wire cloth, perforated metal plate and electroformed sheet--Nominal sizes of opening"
GB/T6005-1997试验筛金属丝编织网、穿孔板和电成型薄板筛孔的基本尺寸
5.
The study of the stem's secondary xylem of Rhus chinensis Mill reveals that perforation plate is simple perforation plate.
对盐肤木茎进行木材解剖学研究,发现其导管分子穿孔板为单穿孔板。
6.
Rudimentary Researches on the Acoustic Characteristics of Microperforated Panel Absorbers with Alterable Air-Cavity;
不等腔微穿孔板组合吸声结构的吸声特性初探
7.
The Type and Evolution of Vessel Element Perforation Plate of Vaccinium uliginosum;
笃斯越桔根导管分子穿孔板的类型及演化
8.
The Computer Simulation Analysis of Micro Perforated Panel Spacial Absorbers (Rectangular Pyramid)
微穿孔板空间吸声体（四棱锥）的计算机仿真分析
9.
The research of perforated plate sound absorption in the flow
气流条件下微穿孔板结构吸声特性研究
10.
Acoustics Software Development of Micro-perforated Panel Absorber Based on AML
基于AML的微穿孔板吸声体的声学软件开发
11.
Improvement of the transfer matrix calculation method for micro-perforated plate absorption structure and experiments
微穿孔板传递矩阵计算方法的改进及实验
12.
Study on Acoustic Characteristic of Double Layer Micro-perforated Panel Absorber at High Temperature
高温下双层串联微穿孔板结构声学特性研究
13.
The Computer Simulation Analysis of Micro Perforated Panel Absorbers and Parallel Structures;
微穿孔板吸声结构及其并联结构的计算机模拟分析
14.
The Application of Perforation Plate in Reducing Oil Sump Noise of Some 6-cylinder Diesel Engine
穿孔板在降低某6缸柴油机油底壳噪声中的应用
15.
This board bores easily.
这块木板易於穿孔。
16.
INFLUENCE OF HOLE POSITION ON BENDING RIGIDITY OF UD-LAMINATE
穿孔位置对单向层板弯曲刚度的影响
17.
Stamp-tax, press the flower, engraving and bore hole the series ceiling.
印花、压花、浮雕、穿孔系列天花板。
18.
not punched card of paper or paperboard[fur punch card machines, whether or not in strips]
未穿孔卡纸或纸板卡片[用于穿孔卡片机,无庥是否条形]