1.
図書 |
United States. Bureau of Labor Statistics ; American Engineering Standards Committee ; American Foundrymen's Association ; National Founders' Association (U.S.)
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2.
図書 |
International Association of Industrial Accident Boards and Commissions ; United States. Bureau of Labor Statistics ; American Engineering Standards Committee
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3.
図書 |
International Association of Industrial Accident Boards and Commissions ; National Safety Council. Rubber Section ; American Standards Association ; United States. Bureau of Labor Statistics
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4.
図書 |
International Association of Industrial Accident Boards and Commissions ; American Standards Association ; Grinding wheel manufactures association ; United States. Bureau of Labor Statistics
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5.
図書 |
United States. National Bureau of Standards
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