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Zhengzhou Coal Mining Machinery Group Co Ltd Tochterunternehmen

The zhengzhou coal mining machinery group company limited zmj was founded in 1958 in zhengzhou china we are one of the world leading manufacturers of longwall mining system our key business is to develop and manufacture hydraulic roof supports with supporting height from 055m to 85m and supporting force from 1600kn to 21000kn.

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