| 摘要 |
A diving bell arrangement having a transportable counterweight in the form of a hollow enclosure which can be filled with sand or water to maintain its position or emptied of that sand or water while submerged, to facilitate its transportation, and pulleys extending between a submersible bell and the counterweight so that the bell may be raised and lowered against the force of the filled counterweight, but the counterweight resurfacing when empty, due to its own buoyancy.
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