Expert title of chief engineer of comprehensive design and research institute: Senior engineer is good at: drainage engineering design, including pipe network, pumping station and sewage treatment expert field: fire fighting engineering, urban sewage treatment technology, advanced sewage treatment and recycling technology, rural sewage treatment technology and management, drainage system and pipe network technology and management, sludge treatment and disposal technology, building water supply, building drainage, sludge treatment equipment, valves, pumps, fans, pipes and fittings, disinfection and dosing.