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水体下放顶煤开采研究现状及其发展趋势 总被引:6,自引:1,他引:5
介绍放顶煤开采技术在水体下采煤领域中的应用情况、观测研究现状及其发展趋势。 相似文献
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The software system, hardware system and performance principle of the gas detector were briefly described. A new method was developed for orientating and calibrating the instrument. The method shows excellence in automation and intelligence,and presents simpler and more reliable new method for orientating and calibrating the nominal physical quantity of the nonlinear sensor. 相似文献
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介绍了CST软驱动系统、长距离带式输送机对驱动系统的要求及采用CST的带式输送机特性,总结出CST的性能完全能满足要求并使长距离带式输送机的性能达到最好。 相似文献
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