Introduction to Several Methods of Fast Digging, Open PDF Document Details Document Type Technical Report Publication Date Feb 22, 1984 Accession Number ADA139452 Entities People Haoze Chen Organizations National Air and Space Intelligence Center Tags Communities of Interest Biomedical DTIC Thesaurus Topics Air Air Pressure Boreholes Compressed Air Construction Detonations Drills Dump Trucks Dynamite Efficiency Excavation Foreign Technology Machines Materials Security Translations Vehicles