| Standardization field | Basic standards | 
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| Technical committee | BAS/TC 17- Technical drawings and symbols | 
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| Term (EN) | reference line | 
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| Definition (EN) | continuous narrow line connecting with the leader line horizontally or vertically and on or at which the additional instructions are indicated | 
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| Term (FR) |  | 
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| Definition (FR) |  | 
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| Term (DE) |  | 
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| Definition (DE) |  | 
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| Term (BS) | referentna linija | 
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| Definition (BS) | Puna tanka linija koja povezuje pokaznu liniju horizontalno ili vertikalno i na kojoj su navedene dodatne
upute. | 
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| Term (HR) |  | 
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| Definition (HR) |  | 
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| Term (SR) |  | 
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| Definition (SR) |  | 
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| Date | 2016-02-29 | 
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| Standards | BAS ISO 128-22:2006 | 
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