| 摘要 |
<p>A liquid level indicator device adapted to mount onto the upper surface or lid of a liquid container such as a water butt comprises a float stick having a scale and a float at its base which floats on the liquid in the container, a support indicator column adapted to be mounted on the upper surface and through which the float stick extends substantially vertically, and having a pointer means to indicate on the scale the level or volume of liquid in the container.</p> |
