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介绍对ＱＹ３２０－１３／３２型掩护式液压支架的适当改造设计技术，并投入难采煤层使用和取得较好成效的经验。
Describes the QY320-13 / 32 type of shield hydraulic support the appropriate transformation of design techniques, and put into difficult to use the coal seam and obtain good results in the experience.