| 摘要 |
PROBLEM TO BE SOLVED: To provide a draining unit which has a structure such that the entire bottom surface of a drain ditch is visible in order to ensure high draining efficiency and to positively remove waste remaining in the drain ditch. SOLUTION: According to the structure of the draining unit, a bottom of the drain ditch is formed like a half pipe, and an upper portion of each side wall extending from the bottom forms a ditch aperture that opens in a longitudinal direction of the drain ditch. Further the ditch aperture is formed so as to have a width equal to or wider than a half pipe diameter forming the bottom of the drain ditch. COPYRIGHT: (C)2006,JPO&NCIPI
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