JINGKELIAN QHD/KP Double Pendulum Hardness Tester Konig pendulum + Persoz pendulum
SE
K pendulum + P pendulumISO1522、ZBN72020-86
Swing bar type K pendulum + P pendulum, Konig swing bar mass 200 +/- 0.2g, Konig swing period 1.4 +/- 0.02s, Persoz swing bar period 1 +/- 0.001S, Persoz start and end swing angle 12 °/4 °