Double insulated droll tests
Contributors: Helfrich, William J; Reynolds, Richard L., joint author
Series: MSHA informational report ; 1081
Publisher: Dept. of Labor, Mine Safety and Health Administration
Published: 1978
Place of publication: [Washington]
Language: eng
Number of pages: 28
Subjects: Mining machinery -- Testing; Boring machinery -- Testing
Notes: Prepared by William J. Helfrich and Richard L. Reynolds