Tightening wires are widely used in the construction and maintenance of the construction and maintenance of electricity, railway contact network, telecommunications, construction, mining, post and telecommunications, communications and other departments and the maintenance and maintenance of daily lines. The tight wire is suitable for tight lines in the line construction, adjusting the arc, pulling lines and other work. The tights are particularly suitable for the traction of the narrow workplace, field, high -altitude operations, and various angles. , And can easily choose the appropriate operating location, or expand its load capacity with a small tonnage.