Features: 1. Accurate positioning : crawling instruments have functions of dormancy, pause, slow start, slow stop, etc. 2. Convenient operation : positioner has functions of setting forward and backward, launching and receiving strength adjustment . 3. Leading technology: adopting the newest motor and fully functional protection driver, without any other electronic pulse interference. 4. Uniform phase: with the kv regulating function, transillumination to ensure the x-ray film and degree of consensus. 5. Safe and reliable: with automatic return functions when wet, blocked and over temperature, under voltage, and ma kv fault. Wooden case