Calculations show that the annularclearance 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。
2
The annularclearance 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。
3
In order to study effects of convection and radiation on unstable temperature field of rocket charge with annularclearance in the interior, the charge temperature field was simulated.