Calculations show that the annular clearance leakage by the mode of gradually reducing clearance is much less than that by the mode of equidimension clearance.
文末算例表明，渐缩间隙模型的环隙漏失量比平行平板模型的环隙漏失量小得多。
The annular clearance was also enlarged, thus the thickness and strength of the cement sheath was increased, and the oil well life of the sidetracked slim hole was also prolonged.
扩孔加大了环空间隙，固井后水泥环厚度和强度增大，可以延长侧钻小井眼油井寿命。
In order to study effects of convection and radiation on unstable temperature field of rocket charge with annular clearance in the interior, the charge temperature field was simulated.
为了研究对流和辐射对内含环形空气间隙的某火箭发射装药的非稳态温度场的影响，对装药温度场进行了数值模拟。
Cementing of the slim hole is very difficult due to its small hole size and annular clearance, and the conventional cementing technology cannot meet the requirements of field cementing.
小井眼固井由于其井眼尺寸小、环空间隙小，给固井作业带来较大困难，常规固井技术难以保证其固井质量。
Cementing of the slim hole is very difficult due to its small hole size and annular clearance, and the conventional cementing technology cannot meet the requirements of field cementing.
小井眼固井由于其井眼尺寸小、环空间隙小，给固井作业带来较大困难，常规固井技术难以保证其固井质量。
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