About the issue of controlling knives in railway passenger transportation

1. Any knife that meets one of the following standards can be recognized as a controlled knife: 1. Dagger: single or double-edged with a handle, a knife grid and a blood groove, and the tip angle is less than 60 degrees. Or a multi-edged sharp knife. 2. Triangular scraper: a machining tool with three blades. 3. Spring knife with self-locking device (jumping knife): After the blade is unfolded or ejected, it is a self-locking folding knife that can be fixed by a spring or lock in the handle. 4. Other similar single-edged, double-edged, and triangular-edged knives: all types of single-edged, double-edged, and multi-edged knives with a blade tip angle less than 60 degrees and a blade length exceeding 150 mm. 5. Other types of single-edged, double-edged and multi-edged tools with a blade tip angle greater than 60 degrees and a blade length exceeding 220 mm. 2. Various martial arts, crafts, gift and other knives that have no cutting edge and a tip chamfer radius R greater than 2.5 mm do not fall into the category of controlled knives. 3. Explanation of predicates: 1. Knife handle: refers to the part of the knife used to hold. 2. Knife grid (hand stop): refers to the part of the knife used to isolate the handle and the blade. 3. Blade: refers to the part of the knife used to complete cutting, sharpening, stabbing and other functions. 4. Blood groove: refers to the special groove on the blade. 5. Blade tip angle: refers to the angle between the point on the blade and the back of the blade (or the blade on the other side) that is 10 mm away from the tip of the blade and the tip of the blade. 6. Blade (blade): refers to the side of the blade used for cutting, sharpening, and chopping. Generally, the thickness of the blade is less than 0.5 mm. 7. Tool tip chamfer: refers to the arc of the tool tip.

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