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Jongalogs ∙
speed ballpens and pen holder come in different grades and styles from 0-6 from bold to fine each is designated for certain stylesof lettering styles c is used for text and roman letters while style d is for rounded roman letters
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The seven areas of drafting are: architectural drafting, civil drafting, mechanical drafting, electrical drafting, electronics drafting, aeronautical drafting, and marine drafting.