| 摘要 |
A drain trap is provided to improve the draining performance of the sewage through the orifice phenomenon by combining the sewage with the integral or separated water-sealing trap. A drain trap for discharging the sewage through a cover(10) having plural discharge holes(12) is composed of a water-sealing trap(20) buried in the floor and combined with the cover to pass through the sewage, to form a water collecting space where the passed sewage is firstly gathered, and to discharge the sewage; and plural spiral structures laid at the upper part of the trap, installed between the water collecting space, and formed with a swirl shape at one surface of inner or outer surfaces.
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