Peak of the cutting machine to the frontal attack and its combination with a peak corresponding

摘要

1,168,617. Mineral-mining picks. AUSTIN HOY & CO. Ltd. 24 Feb., 1967 [18 March, 1966], No. 12136/66. Heading E1F. A forward attack coal cutter pick has a shank extending substantially at right angles to an arm 10 extending forwardly of the shank when the shank is secured in a holder 16 and terminating in a cutter tip 11 that is wider than the arm. Preferably the tip, arm and shank are so formed as to be symmetrical about a common plane.