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Permissible mine equipment approved during 1957-58

Permissible mine equipment approved by the Bureau of Mines during 1959-60 :with appended lists of manufacturers of flame-resistant trailing cables and fire-resistant conveyor belts and holders of permits

Permissible mine equipment approved by the bureau of mines during 1953-62 :a supplement to Bulletin 543

Permissible mine equipment approved by the Bureau of Mines during 1965-66 :a supplement to Bulletin 543 and Information circulars 8220 and 8299

Published Year

1960-1969 (4) *

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