Based on introducing the working principles of the metal bar code, a method to manage drill string by planting metal bar code into the connection was developed.
结合柳湾煤矿开拓巷道 ，顺槽和综采工作面切割巷 ，采用锚网支护试验对金属网的作用机理进行重点研究。
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Main products include ductile manhole covers, composite resin covers, drill rod cement covers, galvanized steel grating, polymer alloy covers, cast iron manhole covers, flower bar, cast iron pipe.