| 摘要 |
PROBLEM TO BE SOLVED: To provide a tap structure of a sluice gate easily castable in both square and circular shapes by a single molding die by merely changing a part of the specifications of the molding die such as a wooden form. SOLUTION: This sluice gate comprises a door contact 5 in which a tap is formed and a door body liftably attached to the door contact and opening and closing the tap. A circular tap 4 is formed at the center of a square tap S by integrally projecting a flange part 14, which closes the four corners of the square tap S, from the inner peripheral surface S1 of the tap. COPYRIGHT: (C)2009,JPO&INPIT |
