|
US3605567A
|
|
Piston and cylinder devices
|
|
US3564974A
|
|
Pressure-fluid systems
|
|
US3566801A
|
|
Transport means
|
|
US3534559A
|
|
Mine roof supports
|
|
US3523424A
|
|
Mine roof supports
|
|
US3531162A
|
|
Metered supply of pressure fluid for longwall advance system
|
|
US3530490A
|
|
Self-advancing mine and roof support systems
|
|
GB1185436A
|
|
Improvements in or relating to Devices for Lifting a Mineral-Face Conveyor.
|
|
GB1205154A
|
|
Improvements in or relating to mine roof supports
|
|
US3525227A
|
|
Mine roof supports
|
|
US3488966A
|
|
Mine roof supports
|
|
US3528342A
|
|
Pressure relief valve
|
|
US3471201A
|
|
Mineral mining arrangement including track for a mining machine
|
|
GB1210069A
|
|
Improvements in or relating to mining equipment control systems responsive to the passage of a body
|
|
GB1159495A
|
|
Improvements in or relating to Self-Advancing Mine Roof Supports
|
|
GB1153800A
|
|
Improvements in or relating to Mine Roof Supports
|
|
US3395616A
|
|
Self-advancing mine roof supports
|
|
GB1159992A
|
|
Improvements in or relating to Fluid Flow Control Valves
|
|
GB1124665A
|
|
Improvements in or relating to mine roof supports
|
|
GB1182252A
|
|
Improvements in or relating to Mine Roof Support Systems.
|
