Hangzhou Naizhun precision machinery Co.,Ltd. is a professional engaged in wind power hydraulic wrench, hydraulic torque wrench special pump, hydraulic tensile, torque multipliers and other hydraulic tools R & D, production and leasing of manufacturers, mounting and dismantling focus on large bolts and nuts. Company is located in Hangzhou District, Yuhang, the surrounding industrial facilities, convenient transportation. We are adhering to the "quality as the fundamental, service and development" concept, dedicated service in wind power, metallurgy, petrochemical and other fields. The company has passed ISO9001-2000 quality management system certification, can be in strict accordance with the standards of quality management system, the enterprise since its inception always implement the "quality first, service first" purpose, making the company's products are recognized by the majority of customers at home and abroad.