Assertion: marimba's resonator | /r/HasProperty | process
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Source sentences:
text: This result is achieved by the custom manufacturer Marimba One by widening the resonators into an oval shape, with the lowest ones reaching nearly a foot in width, and doubling the tube up inside the lowest resonators—a process known as "Haskelling", originally used in pipe organ resonators, and named for its inventor, William E. Haskell.