1. Production hazard included biological hazard, chemical hazard, and physical hazard.

2. The potential hazard in the production included biological hazard, chemical hazard, and physical hazard.

3. HACCP is a kind of control system; the preventive harm is a kind of food for protection against biological, chemical and physical hazard management tools.

4. Securityis that one is in a free state and measures without physical hazard and mental panic.

5. The latent hazard includes biological hazard, chemical hazard and physical hazard.