| 摘要 |
PROBLEM TO BE SOLVED: To provide a cover for a drain ditch, which is easy to clean, comfortable to walk on and well designed. SOLUTION: A cover 11 for a drain ditch is installed over a drain ditch 12 of a waterproof pan 1. The cover 11 is made of a platy body and one and more bottom projections 112 and one and more side projections 113 are provided to form a space between the side edge of the cover and the profile of the drain ditch 12.
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