US4173421A
(en )
1979-11-06
Shield apparatus for use in tunnelling or mining
GB2060043A
(en )
1981-04-29
Mine roof support assembly
PL88210B1
(en:Method )
1976-08-31
PL108210B1
(pl )
1980-03-31
Obudowa kroczaca do zastosowania w grubych pokladamobile lining for use in thick coal beds ch wegla
US3225547A
(en )
1965-12-28
Travelling hydraulic development frame for mining operations
HU182613B
(en )
1984-02-28
Shield supporting device of mine
US4186969A
(en )
1980-02-05
Apparatus for controlling the position of a mining machine
CS203073B2
(en )
1981-02-27
Facility for adjusting the cutting level of the plane or similar instrument of the hoisting engine
US1710449A
(en )
1929-04-23
Metal awning
US3448584A
(en )
1969-06-10
Hydraulic casing units for mine workings
PL90458B1
(en:Method )
1977-01-31
PL91359B1
(en:Method )
1977-02-28
PL80728B1
(en:Method )
1975-08-30
PL114247B1
(en )
1981-01-31
Walking roof support trestle
PL80887B1
(en:Method )
1975-08-30
HU176298B
(en )
1981-01-28
Device whitch suitable for sustaining and after tightening of longwall cutter and transporter used at sloped longwall
US4069676A
(en )
1978-01-24
Mine packing equipment
PL48342B1
(en:Method )
1964-06-15
US4293248A
(en )
1981-10-06
Walking roof support
SU1740682A1
(ru )
1992-06-15
Секци посадочной крепи
SU693036A1
(ru )
1979-10-25
Устройство дл подъема лесоматериала
SU1645535A1
(ru )
1991-04-30
Крепь сопр жени
SU508575A1
(ru )
1976-03-30
Защитное устройство верхней ножевойчасти проходческого щита
SU1416708A1
(ru )
1988-08-15
Шахтна крепь
CS262524B1
(cs )
1989-03-14
Jednotka důlní kombinované výztuže pro nízké sloje