| 摘要 |
PROBLEM TO BE SOLVED: To provide product constitution for constructing an environmental revetment and a water passage considering the whole ecological system of animals and plants improving this point and giving calmness on regional inhabitants and seeing persons since the excellency of a concrete product has tough and permanent points. SOLUTION: In the revetment, the through hole of a front wall is a slot, the revetment is made a plurality of composite end walls or the products of virtual rear face plates so that it is self-standing and can be made a dry masonry, the nests of wild birds are protected from a foreign enemy on the crest of the blocks, which can be easily constructed, the water passage is deep, a plurality of through holes are provided in a side wall, fish and shellfish living boxes are under side wall rear face filling, a parapet is on the crest, and a smooth face block is made a means for constructing the nest of the wild bird.
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