Field evaluation of a proximity alarm device
By: by Richard L. Reynolds ; Pittsburgh Technical Support Center
Contributors: United States. Mining Enforcement and Safety Administration
Series: MESA informational report IR ; 1035
Publisher: U.S. Dept. of the Interior, Mining Enforcement and Safety Administration
Published: 1976
Place of publication: [Washington]
Language: eng
Subjects: Cranes, derricks, etc. -- Safety appliances; Electric lines -- Safety measures