Yantai haisan construction machinery co., ltd. is the development production and construction machinery is the enterprise, national technical quality supervision bureau appointed manufacturer, has more than 1200 employees, the factory area of 280000 square meters, the technical force is abundant, the production equipment is excellent. is the production, management of construction machine mainly integrated company. the company's main production: qtz31.5 (hs3808, hs4207), qtz40 (hs4209, hs4708, hs5008), qtz63 (hs5013, hs5510), qtz80 (hs5613), qtz125 (hs6015), qtz160 (hs6021), qtz250 (hs7030), qtz315 (hs7040) series of tower cranes; qtz80, qtz110, qtz125 crew cut crane tower; sc200/200 type construction lifter; jzc350, js series of concrete mixer, pl series concrete ingredients machine, hzs series concrete mixing station; our hbt series pump and hoist, such as the water conservancy project machinery; hsw series rotary bearings, xl series rotary speed reducer, wcj120 series, bx series luffing deceleration machine, hsgk series hydraulic station yg series, high strength bolt, qt series hoist, multi-function limiter, zl series luntaishi loaders and other products. at present, the enterprise by the through the gb/t19001-2000 and iso9001:2000 quality management system certification. and to have the special equipment of the people's republic of china manufacturing permit, certificate numbers: ts2410b25-2011. it has been evaluated as "china famous brand key popularized unit", "china excellent quality assured brand" honorary title. products have been sold well all over the country and exported to north korea, vietnam, mongolia, russia, kazakhstan, and ukraine, turkey, algeria, saudi arabia, the united arab emirates, congo, angola, brazil and other countries.