一九八一年,有二十三个省、市、自治区,八十三个单位承担煤矿机械制造任务。其中:重点煤机厂三十四个,地方厂四十九个。到十二月底共完成产品产量十四万七千三百六十吨,为计划的百分之一百二十九点七,比去年实际增长百分之三点六。其中:三十四个重点煤机厂完成产品产量十三万八千四百四十三吨,为计划的百分之一百三十 In 1981, 23 provinces, municipalities and autonomous regions and 83 units undertook the task of manufacturing coal mine machinery. Including: focus on coal mines thirty-four, forty-nine local plants. By the end of December, a total of 147,360 tons of products were completed, representing 129.7% of the plan, an actual increase of 3.6% over the previous year. Of which: 34 key coal mills completed the production of 138,443 tons of products, one hundred thirty percent of the planned