1.
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。
2.
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
3.
This board bores easily.
这块木板易於穿孔。
4.
A Kind of Approximate Arithmetic for Micro-perforated Panel Absorber with Variational Cavity
单层变腔深微穿孔板吸声体的一种理论近似算法
5.
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
6.
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。
7.
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
8.
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
9.
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]
10.
Frequency of the wide-band sandwich transducer with single hole in relation of the hole's size
穿单孔换能器的频率与孔尺寸间的关系研究
11.
" 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
12.
Could you tell me the price different between micro via PCB and through hole via PCB?
你能告诉我微过孔电路板与穿透式过孔电路板价钱的差别吗?
13.
Study on the Gas-liquid Dual-flowing the hole and Oscillating Regulation of the Compound Tray;
复合塔板上气液穿孔流动及波动规律的研究
14.
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
15.
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
16.
Technique to make high-density double side printed circuit board the method of punching through board;
高解像度双面印刷电路板的穿通孔法制造工艺
17.
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
18.
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