| 摘要 |
An apparatus (10) and method is disclosed for recovering a cleaning material (12) and a surface material (20A) with a vacuum source (25). The surface material (20A) is removed from a surface (20) by projecting the cleaning material (12) such as sand, water or the like from a nozzle (14) to impact upon the surface (20). The apparatus (10) comprises a housing (16) having a housing opening (18) for projecting the cleaning material (12) through the housing opening (18) onto the surface (20). A fluid seal means (30) provides a seal between the housing (16) and the surface (20). The vacuum source (25) is connected to the housing (16) for withdrawing the impacted cleaning material (12A) and the surface material (20A) removed from the surface (20).
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