Search
Search U.S. government technical reports digitized or harvested by TRAIL.
Keyword Search
7 results returnedSearch results
- Permissible blasting units
- Permissible methane detectors
- Investigations of Permissible Electric Mine Lamps, 1930-40
- Fuel for permissible flame safety lamps :(a revision of RI 3389)
- Permissible mine equipment approved during 1944
- Permissible mine equipment approved to January 1, 1947 :with appended list of available flame-lamp fuels
- Permissible mine equipment approved during the calendar year 1947 :supplement to Information Circular 7432