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内燃凿岩机是一种自身带有动力的轻便凿岩工具,适合于野外露天凿岩爆破工程中使用。在毛主席无产阶级革命路线指引下,沈
Internal combustion rock drill is a self-powered portable rock drilling tool, suitable for outdoor open-pit rock blasting projects. Under Chairman Mao’s proletarian revolutionary line, Shen