| 摘要 |
The housing for a hand-held terminal includes a first acoustical coupler having a muffler disposed therein facing the bottom of the housing. A hinged cover plate includes a second acoustical coupler having a muffler member adapted to nest within the other muffler when the cover plate is pivoted to a closed position flush with the bottom of the housing. When the cover member is pivoted to an open position it contacts a shoulder on the housing providing an abutment surface to hold the cover plate in an angular position conforming with the configuratiion of a telephone handset.
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