1.
Study on Electroplated Diamond Bit for Extra-hard, Compact and Weak-abrasiveness Formation;
坚硬致密弱研磨性岩层电镀金刚石钻头研究
2.
Development and Application of Wire-line Coring Bit for Hard and Compact Rock Formation
坚硬致密岩层用绳索取心钻头的研制与应用
3.
A very hard, dense, even - textured, silica - bearing sedimentary rock used in whetstones.
均密石英岩非常坚硬，致密，结构均匀，含硅的沉积岩，用作磨石
4.
It may be gouge of finely comminuted rock material with perhaps large blocks of the harder rocks embedded in it.
可能是磨碎的岩层物质组成的断层流，并夹杂一些大块坚硬岩石。
5.
Main influ-encing factors on rock abrasiveness are the sturdiness of rock mass and contentof hard minerals,and the coefficient of rock abrasiveness is a function of thespecific energy consumption in drilling and the content of hard minerals.
影响岩石磨蚀性的主要因素是岩石的整体坚固程度和硬矿物含量。
6.
compact coating
致密涂层,坚固涂层
7.
Study on Technology of Hard and Thick Top-coal Weakening in Fully Mechanized Caving Faces in Binchang Mining District;
彬长坚硬厚煤层综放开采顶煤弱化技术研究
8.
The Prediction of Fractured Gas Reservoirs of Tight Clastic Rock;
致密碎屑岩气藏裂缝性储层预测方法
9.
The Rock Mechanical Characters and Fracture Stress Sensitivity Research of Dense Reservoir in West Sichuan Basin;
川西致密储层岩石力学特性及裂缝应力敏感性研究
10.
Influence of Weak Mudstone Intercalated Layer on Mechanical Properties of Laminated Salt Rock
软弱泥岩夹层对层状盐岩体力学特性影响研究
11.
A Research on Tight Sandstone Reservoir Heterogeneity of He 2-3 Member of Lower Shihezi Formation in Tabamiao Block;
塔巴庙区块下石盒子组盒二、盒三段致密砂岩储层非均质性研究
12.
Application of SYZX75 Wire-line Coring Hydro-hammer in Hard Compact "Skid" Formation
SYZX75型绳索取心液动锤在坚硬致密“打滑”地层的应用
13.
Study on Wear Resistance Behaviors of Hardening Coatings Sprayed on Corrugating Rolls Surface
瓦楞辊表面喷涂硬质涂层耐磨性研究
14.
RESEARCH ON TIME EFFECT OF ROCK WEAKENING BY WATER-ROCK INTERACTION OF REDBEDS IN SICHUAN BASIN
四川盆地红层水岩作用岩石弱化时效性研究
15.
RESEARCH ON SHEAR CREEP PROPERTY OF TYPICAL WEAK INTERCALATION IN REDBED SOFT ROCK
典型红层软岩软弱夹层剪切蠕变性质研究
16.
Research on Seismic Prediction and Evaluation for the Fracture in the Compact Clastic Rock Reservoir;
致密碎屑岩储层裂缝地震预测与评价方法研究
17.
The Study of Mechnisms of Aqeous Phase Trapping and Its Applications in Tight Sands Gas Reserviors;
致密砂岩气层水相圈闭损害机理及应用研究
18.
Study on Seismic Detection Method of Fracture-cave Contained in Compact Carbonate Reservoir;
致密碳酸盐岩缝洞储层地震检测方法研究