Ring porous wood

The results showed that the other indices of the three ring porous wood from plantation were slightly larger than those of natural forest except that elastic modulus of bending,impact toughness and resistance to cleavage from plantation were less than those of natural forest.

通过对檫树、酸枣、米槠人工林和天然林木材物理力学性质的测定和比较分析,结果表明:3种环孔材人工林木材除抗弯弹性模量、抗劈力和冲击韧性小于天然林外,其余指标均稍大于天然林。

The study on the stem secondary xylem of Lonicera maximowiczii,reveals the wood belongs to ring porous wood.

研究紫枝忍冬茎次生木质部结构,其为环孔材。

The anatomic study of the secondary xylem in Oplopanax elatus stems were conducted and its results showed that it was a ring porous wood and its rays were heterogeneous Ⅱ ones.

东北刺人参为五加科植物[1],本文对其茎次生木质部进行结构植物学研究,发现其为环孔材,射线为异形型。

regeli presented very great difference between the vessel members in its early and late woods and belonged to ring-porous wood;its vessel members had simple perforation plates,heterotypic Ⅱ-b rays helical thickened fiber tracheids and sepate wood fiber.

结果表明:东北雷公藤茎次生木质部早晚材导管分子大小差异极大,为环孔材;导管分子穿孔板均为单穿孔板;异型Ⅱ-b射线;纤维管胞具螺纹增厚;具分隔木纤维。

The results showed that Chinese ash wood was ring-porous wood and had many longitudinal parenchyma,the early wood vessel was round or oval,wood ray was homeotype ray.

结果表明:白蜡条木材属于环孔材,早材管孔为圆形、椭圆形,轴向薄壁组织量较多,木射线纺锤形、多为同型木射线;白蜡条纤维长度、宽度、胞腔直径、壁厚、壁腔比分别为500~1 428μm、10~24μm、7~20μm、1。

A Presentation of (1,2)-knots via the Mapping Class Group of the 4th-punctured Torus

用穿四孔环面的映射类群表示（1，2）-纽结

Hole Clearing by air-lift reverse circulation method in bored piles

冲(钻)孔灌注桩气举反循环清孔工艺

circular perforated air diffuser

环形穿孔空气扩散器

small ear-ring (used to keep the hole in a pierced ear open )

（用以保持耳环孔不封口的）小耳环.

The Parameters Optimization of the Reverse Circulation DTH Hammer and Studies on Its Drilling Technique;

全孔反循环潜孔锤参数优化及其钻进工艺研究

Study on Annulus Pressure Distribution after Perforation of Composite Perforators

复合射孔器射孔后环空压力分布试验研究

Provenance Analysis and Sense of Palaeogeo Graphical Environment in Kong One and Two Paragraph of the South of Kong Dian in Huang Hua Depression;

黄骅坳陷孔店南部孔一、孔二段物源分析及古地理环境意义

Microsurgical Anatomy of Anterior Circulation of Willis Circle via Supraorbital Keyhole Approach;

眶上锁孔入路Willis环前循环的显微解剖学研究

Study of Relationship between Spatial Resolution of Ring Coded-aperture Images and the Width of Ring in ICF;

ICF中环孔编码成像分辨率与环宽关系的研究

Finite Element Analysis on Structure Mould Hole of Circular Mould Pelleting Machine

环模制粒机中环模结构型孔的有限元分析

Cover with ring in it which fit into special hole make in sheet of paper

带特别孔的纸中装入带环眼的硬封皮

Harold looked around at the silent ring of faces,

哈罗德环顾着这一圈沉默着的面孔，

She had her ears pierced in order to be able to wear earrings.

她为了能戴耳环而把耳朵穿孔。

a small hole or loop (as in a needle).

一个圆形小孔或小线环（比如针眼儿）。

Insert block heater assembly into core hole with element loop pointing Up.

将电热器组合插入中心孔，元件环 向上。

The Experimental Research on the Working Stress Measurement of Concrete by the Ring-Hole Method;

环孔法测试混凝土工作应力试验研究

The Theoretical Analysis and Testing of HgCdTe Loophole P-N Junction;

碲镉汞环孔P-N结理论分析与测试

Middle and Deep Hole Controlled Blasting of Rock Cut in the Complicated Surroundings;

复杂环境下路堑土岩中深孔控制爆破