Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Marking articles made of silver in combination with gold
Definitions; requirements for quality marks; general requirements; history of project. (5¢)
Marking articles made of silver in combination with gold
Definitions; requirements for quality marks; general requirements; history of project. (5¢)
Marking articles made of silver in combination with gold
U S Nat Bur Standards -- Commercial Standard
1935
9 pages
Standard
Englisch
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Marking articles made of karat gold
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Marking of gold filled and rolled gold plate articles other than watchcases
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Marking of articles made wholly or in part of platinum
Engineering Index Backfile | 1938
Marking of articles made wholly or in part of platinum
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