| 摘要 |
<p>A dispersal valve and canister with the dispersal valve resiliently supporting a loaded canister in the dispersal valve. The canister includes a visual indicator to permit a user to determine when the canister needs to be replaced with the canister having an air pocket for retaining at least a portion of the dispersant above the liquid with the canister including sides to funnel the unused dispersant into the trough to displace the dispersant in the liquid that is dispensed into the liquid so that the the rate of dispersant of dispensing material into the liquid remains substantially constant during a substantial portion of the time the dispersal valve dispenses material into the liquid. <IMAGE></p> |
