B - Operations – Transporting – 28 – D
Patent
B - Operations, Transporting
28
D
90/48
B28D 1/00 (2006.01) B28D 1/26 (2006.01) E01C 23/085 (2006.01)
Patent
CA 1197124
ABSTRACT There is described apparatus for scabbling concrete in which the cylinder block which has a plurality of scabbling bit- carrying pistons mounted for reciprocal movement within a frame such that it is free to move within the frame in the direction of reciprocation of the piston.
410697
Allan David T.
Fetherstonhaugh & Co.
Macdonald (john) & Company (pneumatic Tools) Limited
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