Focused laser beams to assist rock excavation
By: B.R. Jurewicz , L. E. Greenwald, and C. Brown.
Contributors: Greenwald, L. E.; Brown, C. O.; United States. Federal Railroad Administration. Office of Research, Development, and Demonstrations.; United Aircraft Corporation. Research Laboratories.
Series: Report - Federal Railroad Administration ; no. FRA-ORD&D-75-20; Report (National Institute of Standards and Technology (U.S.)) -- no. FRA-ORD&D-75-20.
Publisher: Dept. of Transportation, Federal Railroad Administration; for sale by the National Technical Information Service
Published: 1974
Place of publication: Washington; Springfield, Va
Language: eng
Number of pages: 84
Subjects: Laser beam cutting.; Tunneling.; Railroads -- Earthwork.; Rock mechanics.
Notes: Prepared by the United Aircraft Research Laboraties, East Harrford, Conn., under contract no. DOT-FR-20021 for Federal Railroad Administration, Office of Research, Development and Demonstrations.

Final report, Nov. 1973-Oct. 1974.

UARL report N-971543-11.

Issued Nov. 1974.

Bibliography: p. 71-73.