| 摘要 |
The block (1) is made from an elastic material, e.g. rubber, WVA or other suitable polymer. When the sow (2) is standing on the floor (7), the main part of the block supports her belly, while the narrower ends (3, 4) pass between her front and rear legs. If the sow lies down, the block is compressed, but still keeps her body clear of the floor (7)
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