Rehabilitation and Vocational Reeducation of Crippled Soldiers and Sailors: Letter from the Secretary of War, Transmitting a Response to a Senate Resolution of January 31, 1918, a Report of the Surgeon General of the Army on the Rehabilitation and Vocational Reeducation of Crippled Soldiers and Sailors
... cutting and grinding speeds . Ration and proportion : Simple ratios ; proportion ; pulley and gear ratios ; gear ... Formulas : The use of letters ; substitution in formulas ; use of the parenthesis ; writing formulas ; like and unlike ...
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