Technology Lasl subterrence program rapid excavation by rock melting, 1976, 89p

1.. .... : . * , .*.,...3&.*. . ,: ..II 4-5979-SRdO p UC-3 and UC-66c775 Issued: February 1977Rapid Excavation by Rock Melting== LASL Subterrene Program -=September 1973-…