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A system of Spring Wire round, Square, Triangle, Polygon, or as appropriate, of Iron, Steel,Bronze Alloy or anyone who satisfies the conditions of hardness and flexibility that is necessary to use, applicable to any Class,
A system of Spring Wire round, Square, Triangle, Polygon, or as appropriate, of Iron, Steel,Bronze Alloy or anyone who satisfies the conditions of hardness and flexibility that is necessary to use, applicable to any Class,
