The shank of the briar iteration cannot, for mechanical reasons, match the drastic bend of its gourd counterpart, but the spirit of the shape is usually carried through
Available from: Documents/Tobacco%20Use,%20Mental%20Illness%20and%20Substance%20Use%20Disorders.pdf Giulietti F, Filipponi A, Rosettani G, Giordano P, Iacoacci C, Spannella F, Sarzani R
1950's-60's
Indian Journal of Medical Research (2011)
A new product is considered substantially equivalent to an existing product if it has the same characteristics, "characteristics" legally defined as "materials, ingredients, design, composition, heating source, or other features." The law also allows for a finding of substantial equivalence when a product differs in characteristics but raises no new questions of public health
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