Type 2 structure type of screw head is divided into: I (cylindrical) and III (screw type) in two forms. This standard specifies the SWL worm screw lift (hereinafter referred to as the lifting phase) type, parameters and dimensions. This standard is used in metallurgy, machinery, construction, water conservancy lifting equipment used has decreased and accessories by means of propulsion, flip the worm screw lift. Worm screw lift screw jack ball screw lift manufacturers _ _ Linear drive manufacturer to find Shandong endurance by Texas Machinery Co., Ltd. Kun-ho. Road Zhiyuan, temper forward. Texas Haokun Machinery Co., Ltd. (www.sdnljsj.com) aims to become and you win symbiosis, strategic partners to move forward, more determined to become a reducer, transmission of the most influential companies, together with you leap, common success!