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为了适应我国综采机械化采煤的发展,北京煤矿机械厂最近研制出一种放顶煤功能和机械铺网功能一体的新型液压支架,填补了国家的空白。
In order to adapt to the development of mechanized coal mining in China, Beijing Coal Mining Machinery Factory recently developed a new type of hydraulic support that integrates the functions of caving coal and mechanical paving, which has filled the blank in the country.