eEINGS VOL. IV.---NO. 1. NEW SERIES. … pressure, and afterward cach portion in turn as it the principal parts. ‘The molds are formed in the in- passes under the roller, while, at the same time, suffi- ner or concave side of the revolving ring, A, and the cient pressure is exerted on the other portions of the able that has been made in…
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