1. Small in size and weight, it takes up less space during installation and will become more yellow when folded after use;2. Bohan can effectively control the working speed of the Juqin rail device and the oxygen compression signal;3. Excellent flow characteristics, high vibrancy sensitivity and easy to be slightly thick;4. The chlorine discharge flow type and the chlorine flow type can be used for the orbital components of various spike types;5. Nickel plating on the copper surface can effectively prevent corrosion and pollution;6. The arrow shaft is designed to prevent the arrow from falling and knotting;7. The threaded end is equipped with a PT thread joint, which can effectively seal the threaded connection part;8. The intubation direction of the universal speed regulating valve (PSS) can be adjusted 360°.