Meaning: (a company or institution's) logo, mark, emblem.

GB is a national mandatory national standard. The number consists of the code name of the national standard, the sequence number of the national standard release and the year number of the national standard release (before 1995, the last two digits of the release year were used, and from 1995 onwards, the four-digit full year was used).

Mandatory national standards are standards that protect human health, personal and property safety, and national standards that are enforced by laws and administrative regulations. National standards refer to standards approved and issued by the national standardization authority, which are of great significance to the national economic and technological development and are unified nationwide.

Commonly used standards:

Occupational safety and health standards. On December 29, 1970, the U.S. Occupational Safety and Health Act (Occupational Safety and Health act) was promulgated and implemented after being signed by then U.S. President Richard M. Nixon.

OSHA's goal: To prevent and reduce work-related illness, injury and death by issuing and promoting workplace safety and health standards. Have certain responsibilities for "providing a safe and hygienic working environment for employees" (mainly guidance and supervision responsibilities).