| 摘要 |
An adjustable snorkel is convertible into a fixed snorkel by attaching a curved clamping device onto a flexible section of the adjustable snorkel and thereby setting the flexible section to selected curvature and working angle. The clamping device includes a curved body having an overall length corresponding to that of the flexible section of the snorkel, and two pairs of clamping noses provided at two ends of the curved body for clamping at two ends of the flexible section after the latter has been adjusted to the desired curvature and working angle. The flexible section having the clamping device attached thereto becomes rigid without producing any back pull and therefore allows the adjustable snorkel to function like a fixed snorkel. By detaching the clamping device from the flexible section, the adjustable snorkel is restored from the fixed snorkel.
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