Strickland, W. H.
Characteristics of ultrasonic ranging sensors in an underground environment / by W.H. Strickland and R.H. King. - Washington, D.C. : U.S. Dept. of the Interior, Bureau of Mines, 19932. - ii, 39 p. : ill. ; 28 cm. - Report of investigations ; 9452 . - Report of investigations (United States. Bureau of Mines) ; 9452. .
Includes bibliographical references (p. 35-36).
92026918
Mining machinery--Automatic control.
Sonar.
TN23 TN345 / .U43 no. 9452
622
Characteristics of ultrasonic ranging sensors in an underground environment / by W.H. Strickland and R.H. King. - Washington, D.C. : U.S. Dept. of the Interior, Bureau of Mines, 19932. - ii, 39 p. : ill. ; 28 cm. - Report of investigations ; 9452 . - Report of investigations (United States. Bureau of Mines) ; 9452. .
Includes bibliographical references (p. 35-36).
92026918
Mining machinery--Automatic control.
Sonar.
TN23 TN345 / .U43 no. 9452
622