mining machinery group processing machinery manufacturing

mining machinery group processing machinery manufacturing

Zhengzhou CoalMining Machinery(Group) Co., Ltd (Hereafter referred to as ‘ZMJ’) was established in 1958. After over half a century’s development, ZMJ has become the largestcompanyin the world in respect of R&D andmanufacturingpowered roof support used for fully mechanized coalmining

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