Mechanical pencils. Part 2. Black leads. Classification and dimensions
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Mechanical pencils. General specifications
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Mechanical pencils. Part 1. Classification, dimensions, performance requirements and testing
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Fountain-pens. General technical requirements and test methods
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Ball-point. General technical requirements and test methods
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Fibre pens. General technical requirements and test methods
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Writing units designed for boll-point pens. Specifications
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Product-quality index system. Writing means. Nomenclature of indices
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System of product-quality indices. Type writers and word processors. Nomenclature of indices
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Typewriters. Arrangement of keys and symbols on keyboard
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Spools for ink ribbons of typewriters. Specifications
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Mechanical pencils. Part 2. Black leads. Classification and dimensions
|
