What is the best mechanical pencil lead size (i.e. 0.5, 0.7 etc) and lead type (I.e....

What is the best mechanical pencil lead size (i.e. 0.5, 0.7 etc) and lead type (I.e. Hb etc) for engineering drawing (isometric and orthogonal) ?

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samet mamat answered 1 year ago

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