Songzao Mining Machinery Factory's homemade ZZ hydraulic support is put into use

90 sets of ZZ-type hydraulic supports made by Songzao Coal and Electricity Company Mining Machinery Factory passed the acceptance test and were officially put into use at the lower level of N21102 working face in Xiangyang Coal Mine.


The bracket plays a role in ensuring the comprehensive mining operation on the protective layer, improves the mechanical coal mining process, and alleviates the greater role of the mine's intense mining and deployment.

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