Shandong Dahan Construction Machinery Co., Ltd. is one of the leading Construction Machinery Manufactories in China, whose key products are Tower Crane, Construction Elevator and Concrete Pumps etc, authorized by the General Administration of Quality Supervision of PRC, which has the Grade A Qualification and passed ISO9001:2000 Quality Management System Certification. We digest and absorb France Potain and Germany Liebherr technology, our products have complete safety protecting device for three limit switches and two limiters. Weight limiter adopts Pull-ring structure, moment limiter adopts bow-board mechanical structure which can adapt to bad environment, ensure tower crane limiter sensitive reliable and avoid accidents caused by overload and the use of non-standardization. We use the first robot welding production line in China to weld almost all the parts instead of manpower, use CO2 gas shielded arc welding, inverting automatic submerged arc welding machine and semi-automatic trolley welding to weld other parts, also adopt sands quick cooling welding machine to guarantee all the weldings perfect and exact. Before painting, we adopt impeller blasting system to increase the hardness of the steel structure parts, enhance the coating adhesion and extend the useful life of the equipment. We also successfully developed the flat-top slip tower crane independently whose all performances have reached international advanced levels, it is convenient for being transportation, storage and saving freight when the products are purchased by the clients abroad. As a professional construction machinery manufacturer, all our products have very good cost performances. Excellent quality, competitive price and professional service will let your business easy and comfortable. Welcome you to visit our producttion sites in China. B/rgds, Bruce Hui mobile: 0086 13864182540 Skype: bruce.hui MSN: ***** Shandong Dahan Construction Machinery Co