stigate the pinblock problem shows simply a rectangular frame of moderate thick- an unusual period of time without retuning, which and provide a thoroughly mechanical means for hold- ness and weight, whose function it is to serve as a are distinguishing characteristics of the Mathushek backing upon… … the originator of this method of construction. They The Frame of a Mathushek Grand Piano, Showing have used it continuously for a period of thirty-five Back of Piano, Showing Absence of Heavy Vertical Method of Bracing to Keep the Frame to Its years, and they consider that the fact that, after the…
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