According to the standard:
General Technical Requirements for Testing Machine GB/T2611-2007
Plate Type Elastomeric Pad Bearings for Highway Bridge JT/T4-2004
Pot-type Elastomeric Pad Bearings for Highway Bridge JT391-1999
Pot Bearings for Railway Bridge TB/T2331-2004
Technical Requirements for Spherical Bearings GB/T17955-2000
Tension, Pressure and Universal Testing Machine JJG139-1999