它的研制与成功应用，克服了原来多种热采封隔器的缺点，如操作困难，不座封和不解封的几率较高等。
This kind of packer overcomes many disadvantages of the previous ones, such as difficulty in operation, and high possibility of not setting and not releasing.
首先最重要的一点：如果煤气管道内着火，应立即封闭所有入孔、放散管、采封管，并向管道内通大量蒸汽灭火。
First of all the most important point: if the gas pipeline inner fire, immediately closed all into the hole, radiation tube and sealing pipe, and in general to pipe of steam to extinguish fire.
你们的喝采封演说者有影响。
应用效果表明了煤层气抽采钻孔封孔技术优化，能达到提高煤层气抽采浓度和抽采量的目的。
The results of optimization of sealing technology for CMM boreholes have indicated that aim of improving the concentration and quan…
应用效果表明了煤层气抽采钻孔封孔技术优化，能达到提高煤层气抽采浓度和抽采量的目的。
The results of optimization of sealing technology for CMM boreholes have indicated that aim of improving the concentration and quan…
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