| 摘要 |
This invention provides a unique utility knife, which has at least two extendable and retractable parallel blades. The blades are easily operated with one hand by a mechanism on a non-force-bearing surface of the knife. The blade handle of this utility knife may be bent to enhance the ergonomic ease of use of the knife. As a result, the utility knife is efficient, as well as safe, convenient and economical.
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