| 摘要 |
A unitary damper shaft extender for HVAC air ducts, the extender comprising a unitary apparatus comprised of two interlocked, but relatively movable members. One of the members being capable of interlocking with a damper shaft, and the second member being slidably movable to cover, and thereby lock the first member to the damper shaft, so as to extend its length beyond the usual insulation used for air ducts.
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