8, for oil drilling, oil and gas wells in the circulation rotary drilling mud to increase agent, cooling the bit, cutting away material from the debris, lubricating the drill pipe, closed hole wall, oil and gas pressure control to prevent the oil from the spray.
基于1个网页-相关网页
Is PTH and small via hole wall quality checked by cross-section and followed by a closed loop corrective action?
是否通过切片检验pth与小导通孔孔壁状况，并有相应的改善对策跟踪？
Investigation and researches show that there are some irregular behaviors in house decoration such as wall-tearing and hole-enlarging, floor's overweight and closed veranda.
大量的调查研究表明，目前住宅装修中存在着一些不规范的行为，诸如拆墙扩洞、楼面加载和封闭阳台等。
应用推荐