| 发明名称 |
LESS THAN A HALF WIDTH OF A DAM HAVING AN UPPER PART MADE OF CEMENT CONCRETE AND A LOWER PART COMPOSED OF GENERAL SOIL AND PLANTS, MORE THAN A HALF WIDTH OF A DAM TOTALLY MADE OF CEMENT CONCRETE, AND KOREAN TYPE AND VARIOUS TYPES OF WATER-LEVEL ADJUSTING AND WATERPROOF DAM/RESERVOIR HAVING A RIVER/STREAM CONNECTING FISHWAY |
