Description
Class B31C : MAKING WOUND ARTICLES, e.g. WOUND TUBES
Subclass 7/10: Forming conical paper articles by winding (winding blanks B31B) Forming pointed cones on two or more mandrels
Class B31C : MAKING WOUND ARTICLES, e.g. WOUND TUBES
Subclass 7/10: Forming conical paper articles by winding (winding blanks B31B) Forming pointed cones on two or more mandrels
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