1. The external force required by direction-change of CM3B, CM3L, CM3V and CM3R is provided by external mechanism, which can be used for position test or stoke switch
2. CM3PF, CM3PM, CM3PL, CM3HS, CM3HD and CM3Y are operated manually, owning control joints with several structure forms and suitable for application under different conditions
3. It is in cut-off structure. Internal circle is sealed with good tightness, the direction-change is sensitive and lubricant is not necessary
4. Multi-mounting method makes it convenient to install and apply
5. The control joint of series of CM3L, CM3V, CM3R and CM3Y are made of metal which has longer service life and more reliable and steady performance.