The effect of borehole environment at borehole deformation observation;
钻孔环境在钻孔地形变观测中的作用
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