施工用的

In the treatment of these wells,micro-seismic and tilter meter were used to monitor the fracture spreading.After refracturing,the production histories of oil wells were matched with nume...

在现场施工中,用地面监了缝的形成和扩展过程,压后用数值模拟方法拟合的各井生产历史动态表明,试验井发生了重复压缝转向,证实了地应力场预软件的有效性。

The characteristic, structure, raw materials, equipment, process, cost and applications of arched colour plated roofing are introduced. The foams act as insulator, seal and waterproofer in roofing.

简要介绍了用泡沫塑料保温、密封、防水的拱形彩钢屋面的特点、、料、设备、施工工艺、生产成本和应用。