Hydraulic fluid equipment technical services and maintenance services; production and sales of rubber products, nylon plastic products, silicone fluorocarbon products, stainless steel products, metal products, polyurethane products, Teflon products, hydraulic machinery and equipment, high and low-pressure hoses and assemblies, resin pipes, connectors, metal hoses, bellows compensators, food-grade pipes, plastic strips, guardrails, rubber sealing parts, rubber plates, conveying machinery and equipment as well as installation, and mechanical processing**(Operate according to the relevant provisions of the law, the scope of business is subject to the approval of the administrative authority)**