Lift cage for inspection and repair of shaft lining
PL256894A1
Lift for vertically handling heavy loads in mine shafts
PL256860A1
Apparatus for checking short-circuit protection devices in medium voltage distribution station for their correct operation
PL256225A1
System for additionally protecting against indesirable effects of short circuits a medium voltage ht/mt transformer power substation
PL256226A1
Apparatus for filling bunkers with minerals in particular coal
PL254071A1
Winding gear for inspection and repairs of mine shaft lining
PL252092A1
Apparatus for putting in place and replacing load carrying and tail ropes in winding gears
PL251934A1
Mine car turning over apparatus
PL251823A1
Linear drive
PL251107A1
Spark-proof local battery telephone with its battery recharged from a central battery through a subscriber's line
PL251106A1
Spark-proof wiring system for mine dispacher rooms and automatic switchboard
PL250254A2
Apparatus for indicationg deflections of building structure from vertical when they exceed allowable value
PL250167A2
Apparatus for braking gin tubs on their guiderails
PL250081A1
Compensation joint for shaft mounted methane discharging pipeline
PL249486A1
Apparatus for braking gin tubs after overriding limit positions both in receiving pit and hoist tower
PL249103A2
Belt-type batcher
PL248333A1
Method of making a mine working lining integrated with surrounding ring of cracked rock being consolidated with cement injections under deformative rock pressure conditiins
