Dingey, Peter Spear. [from old catalog] · New York, J. Wiley & sons · leaf 40
, which makes a groove in the core to re-ceive the steel key. It is the intention, when the castings of these headsare being fitted up, to file the round ends, while the sidesare to be finished in the machine, therefore the stockallowed for machine finish must stop off at/^. There need be no fear… … Fig. 18.
Patternmaking
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