1. The rising and falling of weights are controlled by pneumatic means, and the left and right movements are driven by motors.
2. Use special recording paper to record the test curve, precise friction coefficient grid lines, can not copy, scan, if copying will change the spacing between the grid lines, affecting the test results
3. Possess positioning device to reduce measurement error
4. The stylus has automatic shrinking and locking functions, and is controlled by a foot collapse switch
5. The recording pen and recording paper are easy to install and replace, and the test piece is easy to install