| 摘要 |
A surface cleaning apparatus (10) comprises a base assembly (12), an upright handle assembly (14) pivotally mounted to the base assembly (12), a fluid distribution system including a supply of cleaning fluid, and a fluid recovery system for drawing dirty cleaning fluid from the surface to be cleaned. The base assembly (12) comprises a fluid supply tank (22) mounted on a base platform (20), and a recovery tank (24) and lid (70) mounted on the supply tank (22). The nozzle (146) assembly is split into three separable sections, and the upper handle (300) is foldable to a storage position. The base assembly (12) further comprises a pivotal brush carriage (210) assembly. A method for renting extraction cleaning machines (10) utilizes a vending machine (600) that dispenses cleaning formulations packaged in single use packages (602). A surface cleaning apparatus (10) comprises a base assembly (12), an upright handle assembly (14) pivotally mounted to the base assembly (12), a fluid distribution system including a supply of cleaning fluid, and a fluid recovery system for drawing dirty cleaning fluid from the surface to be cleaned. The base assembly (12) comprises a fluid supply tank (22) mounted on a base platform (20), and a recovery tank (24) and lid (70) mounted on the supply tank (22). The nozzle (146) assembly is split into three separable sections, and the upper handle (300) is foldable to a storage position. The base assembly (12) further comprises a pivotal brush carriage (210) assembly. A method for renting extraction cleaning machines (10) utilizes a vending machine (600) that dispenses cleaning formulations packaged in single use packages (602). Provided are compositions and methods for preventing dental caries, as well as aqueous compositions and methods for improving the mechanical strength of teeth. |
