
Specification for percussive rock-drilling bits, rods and stems. Taper fitting detachable bits and rods.
NORMA vydána dne 10.3.1971
Designation standards: BS 4441-1:1969
Note: NEPLATNÁ
Publication date standards: 10.3.1971
Approximate weight : 300 g (0.66 lbs)
Country: British technical standard
Kategorie: Technické normy BS