| 摘要 |
Disclosed herein is a tub apparatus comprising a foamed, resiliently compressible, plastic tub wall having an inner side and an outer side, the tub having an interior to receive liquid, and ports extending through the wall. The tub apparatus further includes a plastic pack having a cavity formed therein for receiving, and protectively enclosing, a pump unit. A water circulation system comprising a tubular duct structure connects the pump unit with the ports for circulating water between the tub interior and the pump unit.
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