Research and development, production, sales and maintenance of FRP pipes,RPMP, pressure pipe components, composite downhole tubing and casing, flexible composite high-pressure conveying pipe, FRP cable laying composite coiled tubing, FRP pipe for coal mine, marine plastic pipe and composite pipe fittings; research and development, production, sales and maintenance of non-metallic pressure vessels, FRP tanks, FRP liners, FRP curved plates, packaging materials for dangerous chemicals, composite material vessels and FRP integrated prefabricated pumping stations; research and development, production, sales, maintenance and inspection of carbon fiber composite products, carbon fiber continuous sucker rods and special joints, FRP sucker rods, composite material guardrails, pultrusion products; downhole operation and technical service of carbon fiber continuous sucker rod; research and development, production, sales and maintenance of composite material laminboards, composite material cabl...