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318931 (900-98718-34BK)

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For architects, engineers, students.

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30 cm metric
307900 (900-987 18-1BK)

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30 cm metric
318949 (900-987 18-4BK)

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12"
318931 (900-98718-34BK)

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12"
318923 (900-98718-31BK)

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