Affordable, compact, simple operation, easy maintenance. 3, low-speed, low frequency: mainly used for high load, low speed and without frequent place of work. SJA spiral screw lift square casing design unique selection SL bevel gear screw lift, use a square tail cover design, control screw does not rotate. There are different forms of construction and assembly in the form of hand-screw jack | leading innovator in Shandong endurance | screw lift provided by the Texas Machinery Co., Ltd. Kun-ho. Texas Haokun Machinery Co., Ltd. (www.sdnljsj.com) (www.sdnljsj.com) is a leader in Dezhou, reducer, transmission, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Endurance leadership with the staff warmly welcome all inquiries negotiations to create a better future for endurance.