American School of Correspondence · Chicago, American school of correspondence · leaf 323
Fig. 205. Oval Plate Holder and Ring. 285 244 COTTON SPINNING … Fis tightening the other two, the ring can be moved a shght distance forsetting it in position. . The cast iron holder is made with a spHt sothat it can be sprung open, sHghtly, to remove the ring. Rings, known as solid rings are also used. They are without holders and are made to fit theholes in…
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