| 摘要 |
PURPOSE:To form a passageway, on occasion, beside a desired water cultivation tank by laterally moving the water cultivation tank with rotators along tracks. CONSTITUTION:A plurality of water cultivation tanks A are arranged and a plurality of rotators 4a and 4b capable of being rotated on tracks 3 are supported with holders 5 in a freely rotatable state, followed by rotating the rotators 4a and 4b with a driving source 6 to form a passageway beside a desired water cultivation tank A. A moving device 2 is mounted to each water cultivation device A to enable the formation of the passageway even beside any water cultivation tank A. |
