| 摘要 |
The adjustable drum is comprised of two cylindrical shells which are telescopically arranged for axial adjustment with respect to each other. At least one of the shells is constructed of metal and a separate set of casings for each drum head are provided on each shell. A plurality of spaced apart insulating strips are disposed between the shells which can be adjusted in a stepwise manner relative to each other. Special adapter plate is provided on one of the shells for supporting a conventional snare strainer mechanism.
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