| 摘要 |
A device for clamping in position to a chimney outlet, a chimney cowl having a vertically-spaced series of three annular vanes centered on a common vertical axis, the device comprising a clamping ring formed by an annular surround spaced below the lowermost vane and being fixed to the lowermost vane. The surround has provided therein tapped bores engaged by screw-threaded elements for urging inwardly against the sides of a chimney outlet.
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