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Pair of Charles Bruning 2711P Chain Scales with Drafting Machine Mounts | National Museum of American History
Pair of Charles Bruning 2711P Chain Scales with Drafting Machine Mounts | National Museum of American History
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MH63-300 Drafting Machine Ruler, 1:100, 200. Length: 300mm with B2 chu – Mathomat geometry drawing template
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