American School of Correspondence · Chicago, American school of correspondence · leaf 321
Fig. 203. SpindleAssembled. Fig. 203. Double Ring in Cast Iron Holder. Spinning Rings. Rings that are supplied with new ring framesare usually double rings, set in either cast iron or plate holders.The ring shown in Fig. 203 is such, in a cast iron holder with wiretraveler cleaner; A, is the…
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