We often see the MA or KA logos on the Mineral Product Safety Mark Certificates issued by the National Mine Safety Approval Center. What do these logos mean?
MA (Mei An)
Issuing and Supervising Authority: China National Administration for Mine Safety Certification (ANB)
Application Scenarioses: Underground coal mines
KA (Kuang An)
Issuing and Supervising Authority: Office of Mineral Product Safety Mark
Application Scenarioses: Non-coal metal mines
Additional Note
KY refers to the General Mining Safety Type, which is used for parts of non-gas or low-gas areas in coal mines, as well as some regions in non-coal metal mines.
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