| 摘要 |
PROBLEM TO BE SOLVED: To provide a kitchen knife sharp for a long time. SOLUTION: The kitchen knife has a sharp replaceable blade like a cutter knife, which is attached/detached by one touch operation. The kitchen knife is free from sharpening, a dull blade is easily replaced with a new one, and the kitchen knife always has a sharp edge and cuts well. COPYRIGHT: (C)2006,JPO&NCIPI
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