| 摘要 |
For a scoring or utility knife typically used in a cutting stroke by being pulled toward the user, the use for assembling together right and left housings serving as a compartment for a retractable blade and as a hand grip, of a screw characterized by a laterally extending cylindrical head which is positioned to be engaged by a thumb of the hand grip to supplement the grip about the knife during its use, and also a front depending abutment to facilitate pushing the knife in a scraping stroke directionally away from the user.
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