Engineers operating an air-burning drill in a stone quarry.
Unissued / unused material - dates and locations may be unclear / unknown.
Russia, USSR / Union of Soviet Socialist Republics
Workman using pneumatic drill. Pan around a working quarry. Various shots, Soviet engineers preparing ground and operating the burner which injects burning air into rock and can pierce the strongest rock 80 times faster than traditional methods (reactive drilling). LS Freight trucks on railway carrying rock away.
Note: Date on original record: 14/10/1958.