constant rate of penetration test.
等贯入率试验
What is the average penetration rate today
今天的平均机械钻速是多少
It is difficult to calculate the penetration rate of percussion drilling.
钻井机械钻速预测是难题。
It appears the auto penetration rate has reached an interim saturation level.
目前看来，汽车普及率已达到了一个临时饱和水平。
The penetration rate by air dust drilling in the hard and dry formation can reach16.
空气粉尘钻井在干硬地层机械钻速达到16。
Correct use of rate of penetration will give many aids to mud logging and well drilling.
正确应用钻时，能够给录井和钻井施工提供很多帮助。
Drilling rig is easy to be destroyed at low rate of penetration with long drilling circle.
机械钻速低，钻井周期长，钻具易损坏。
The Penetration Rate into Pelt of Waxberry Vegetable Extracts with Different Tannin Content
不同单宁含量的杨梅栲胶鞣革的渗透速度
EXPERIMENTS OF PENDULUM ASSEMBLY WITH HYDRAULIC PROPULSION DEVICE TO IMPROVE PENETRATION RATE FOR FORMATIONS WITH BIG DIP ANGLE
钟摆钻具带液力推力器组合提高大倾角地层钻井速度试验
Modified larch tannin was prepared by grafting copolymerization and sulfoalkylation, and successfully used as retanning agent, possessing good water solubility and enhanced penetration rate.
利用接枝共聚和磺烷基化的方法对落叶松单宁改性。
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