| 摘要 |
In a compressed gas filter unit including a housing and, for selective filtering, a particulate desiccant packed in a canister removably seatable from below in a central bore of the housing, a pneumatic compactor automatically charged in any filtering cycle of the filter unit and acting upwardly on the desiccant and therethrough on the canister for compacting the desiccant and pressing the canister fluid-tight against a seat therefor at the upper end of the bore.
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