| 摘要 |
A tank is provided. A fill pipe terminates in a lower output end. The lower output end is located in the tank. An upper input end is located above the tank. A floa t has a rigid rod. The float has an upper end. The upper end is formed as a liquid level indicator. A guide tube has a bottom end and a top. The guide tube has an interior diameter greater than the exterior diameter of the rigid rod. The float is located below the guide tube. The indicator is located above the guide tube. A vertically extending measuring plate extends upwardl y from the tank. Indicia are located adjacent to the indicator.
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