|
GB587766A
|
|
Improvements in coal breaking machines
|
|
GB420429A
|
|
A combined silt recovery plant and continuous filter for use in coal washeries and the like
|
|
US1931390A
|
|
Coal washing machine
|
|
GB369667A
|
|
Automatic control mechanism for coal washing machines
|
|
GB344082A
|
|
Improvements in coal washing machines
|
|
US1831683A
|
|
Coal breaker and the like
|
|
US1763408A
|
|
Coal breaker
|
|
GB304929A
|
|
Improvements in coal breakers and the like
|
|
GB304901A
|
|
Improvements in coal breakers
|
|
GB301204A
|
|
Improvements in coal breakers
|
|
GB288772A
|
|
Differential-pressure cushioning apparatus for colliery jigging conveyors, shaking screens and the like
|
|
GB240645A
|
|
Improvements in colliery cleaning or picking belts
|
