attrition mill การใช้

• During March 1904, a model called the " Halstead Attrition Mill " was advertised as the " most perfect and efficient for grinding all kinds of cereals . " The mill was especially adapted for grinding corn on the cob or shelled, corn and wheat mixed and rye.
• :This seems to be another name for an attrition mill or Ball mill ( have not read it ), the challenge might be more in demonstrating the notability of the inventor or company you write about .-- talk ) 21 : 36, 6 June 2011 ( UTC)
• During March 1904, the firm had ventured into grinding mills and the " Halstead Attrition Mill ", invented by brothers Willard and John G . Halstead, a die casting foreman at the H . H . Franklin Automobile factory was awarded several U . S . Patents ( # 812, 737, # 874, 764 # 879, 211 ).