American School of Correspondence · Chicago, American school of correspondence · leaf 68
Fig. 11. … number of blows per minute, and while Fig. 12. Three-bladed Beater. 57 22 COTTOK SPINNING. some object to this necessary liigli speed, it is certainly cheaperto construct this style. The three bladecl beater is generallyused on openers, and the two bladed on breakers, intermediatesand finishers.
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