| 摘要 |
PROBLEM TO BE SOLVED: To provide low-cost artificial fishing banks without requiring an additional resource. SOLUTION: The artificial fishing banks can be inexpensively installed without requiring an additional resource as a material for fishing banks by mutually crossing and piling used railroad ties 1 made of prestressed concrete in square parallel crosses to form a frame 2 and arranging the frame on the bottom of the sea 3.
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