| 摘要 |
<p>A knife for use under water the handle 2 of which is formed with a number of receptacles 8 for the accommodation of various devices 9 eg: a digital watch, the blade being adapted to be retained in a sheath 10 (Figure 2) having a small compartment 12 housing a reel for filiform material eg: a synthetic thread joined to a cover of the compartment. The compartment cover is releaseable and lighter than water such that when released it will float to the surface of the water to establish a warning indication. <IMAGE></p> |
