发明授权
US4482294A Power unit for single line pneumatic tube system 失效
单线气动管系统动力装置

Power unit for single line pneumatic tube system
摘要:
A pressure-vacuum chamber is mounted in a sheet metal housing having acoustical padding on inner surfaces of walls. The chamber has two vacuum-formed truncated cone members and a longitudinally extending axial partition plate sealingly mounted in inward facing grooves in the members. A flow-through blower is sealingly mounted in an aperture in the plate.
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