| 摘要 |
A maintenance tool usable by workmen involved in the maintenance of hydraulic systems such as water-line installations for homes and other buildings. The tool is constructed for each valve removal and replacement, and line removal and replacement, without the necessity of shutting off water pressure relative to the main or branch line affected. Flared guide means is employed in the tool for directing water streams centrally of the tool for proper valve or other installations.
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