依靠科学技术进步促进企业节能降耗宣化工程机械厂郑世新李恒茂１前言宣化工程机械厂是全国工程机械行业重点骨干企业，主要生产大、中型履带式推土机、装载机等多种产品。于１９８７年首批被评为节能“国家二级”企业，列为“全国１００家最大机械工业企业”，“河北省科... Relying on scientific and technological progress to promote energy-saving enterprises Xuanhua Construction Machinery Factory Zheng Shixin Li Hengmao 1 Foreword Xuanhua Construction Machinery Factory is the key construction machinery industry backbone enterprises, mainly produces large and medium-sized track-type tractors, loaders and other products. In 1987 the first batch of energy-saving as “two national” enterprises, as “the country’s 100 largest machinery industrial enterprises”, "Hebei Province Branch ...