| 摘要 |
A hydrometer that measures the specific gravity of fluid in channels (36) of a hydrometer body (10). The specific gravity is determined according to the buoyancy of balls (40) that are located in each channel. Lenses (42) are provided in body (10) to aid in observing the position of balls (40). Pedestals (38) are provided in each channel to maintain balls (40) out of sediment accumulated at the bottom of the channels.
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