GB2185264B
(en )
1989-10-25
Gasification of coal
GB2167432B
(en )
1988-09-21
Gasification of coal
PL268502A1
(en )
1989-05-02
Getting head of gallery mechanical coal miner
PL261808A1
(en )
1988-07-07
Mining head of a mechanical coal miner
PL252477A1
(en )
1986-09-23
Mining head of a mechanical coal miner
PL248896A1
(en )
1986-02-11
Mechanical coal miner mining head
PL252685A1
(en )
1986-10-07
Slidably mounted mining head of a mechanical coal miner
PL254606A1
(en )
1987-01-26
Mining head of coal plough
PL248792A1
(en )
1986-02-11
Mining head for mechanical coal miners
PL258173A1
(en )
1987-12-14
Mining head of a mechanical coal miner with sprinkling system
PL254203A1
(en )
1986-12-30
Mining head of a longwall mechanical coal miner
PL276280A1
(en )
1989-07-24
Segment of mechanized mine lining
PL253160A1
(en )
1986-11-18
Mining head of a longwall type mechanical coal miner
PL252337A1
(en )
1986-09-23
Frame of a mechanical coal miner
PL255199A1
(en )
1987-04-21
Mining head for a hearing mechanical coal miner
PL255438A1
(en )
1987-03-23
Mining head for a mechanical coal miner of longwall type
PL275158A1
(en )
1990-04-17
Cutting head of a mechanical coal miner
PL253154A1
(en )
1986-11-18
Method of mining coal deposits and mechanical coal miner therefor
PL264767A1
(en )
1988-10-27
Lemniscate mine lining
PL254845A1
(en )
1987-04-21
Mining head for a heading mechanical coal miner
PL246656A1
(en )
1985-09-24
Mining head for a mechanical coal miner
PL274037A1
(en )
1990-02-05
Longwall coal miner
PL255426A1
(en )
1987-05-04
Mining head of a mechanical coal miner for dog headings
PL247753A1
(en )
1985-11-19
Mechanical coal miner
PL249149A1
(en )
1986-02-11
Mechanical coal miner