H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
H03F1/42—Modifications of amplifiers to extend the bandwidth
H03F1/48—Modifications of amplifiers to extend the bandwidth of aperiodic amplifiers
H03F1/50—Modifications of amplifiers to extend the bandwidth of aperiodic amplifiers with tubes only
A—HUMAN NECESSITIES
A43—FOOTWEAR
A43D—MACHINES, TOOLS, EQUIPMENT OR METHODS FOR MANUFACTURING OR REPAIRING FOOTWEAR
A43D11/00—Machines for preliminary treatment or assembling of upper-parts, counters, or insoles on their lasts preparatory to the pulling-over or lasting operations; Applying or removing protective coverings
A43D11/14—Devices for treating shoe parts, e.g. stiffeners, with steam or liquid
A43D11/145—Devices for treating shoe parts, e.g. stiffeners, with steam or liquid with means, e.g. transport chains, for continuously transferring the shoe parts through the machines