The double-wall steel cofferdam is widely applied in bridge deep water foundation due to that it is of characteristics of high structural strength and good waterproof performance.
而双壁钢围堰具有结构强度高、防水性能好的特点，因此，在桥梁深水基础中得到广泛应用。
Adopting survey technology of double-head water-stopped machine flowing high of upward-inclined drillhole rock destruction rules were surveyed, development height of water conducted zone was gained.
采用井下仰斜钻孔双端堵水器导高观测技术对白庄煤矿综放开采条件下，覆岩破坏规律进行了实测，得出了导水断裂带的发育高度。
Biodiesel and material is separated effectively through water vapour distillation, and the high pure degree biodiesel is acquired without double transesterification.
水蒸汽蒸馏技术实现生物柴油与未反应原料的有效分离，不需要二次酯交换反应就获得了高纯度的生物柴油。
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