- Pencil hardness test
- Испытание на твёрдость царапанием карандашом.
Краткий толковый словарь по полиграфии. 2010.
Pencil hardness test
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printing — /prin ting/, n. 1. the art, process, or business of producing books, newspapers, etc., by impression from movable types, plates, etc. 2. the act of a person or thing that prints. 3. words, symbols, etc., in printed form. 4. printed material. 5.… … Universalium
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