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由充州煤炭设计研究院设计、泰安煤矿机械厂制造的22t双层双车罐笼研制成功。该罐笼净宽
Designed by Chongzhou Coal Design and Research Institute, a 22t double-decker double-car cage made by Taian Coal Mine Machinery Factory was successfully developed. The cage is wide and clear