This certificate is issued under the China Mining Product Safety Mark Certification System (CMAC), administered by the National Center for Safety Mark Certification of Mining Products (AQB).

It certifies that the product “Polyurethane Material for Underground Coal Mine Cleaning Device” manufactured by Huibei Hezhong Mechanical Equipment Co., Ltd. complies with the relevant Chinese mining safety technical standard MT/T 113-1995, as well as CMAC certification requirements.

The CMAC certification is a mandatory safety approval system for mining products in China. It involves a comprehensive conformity assessment process, including technical document review, product type testing, factory inspection, and post-certification supervision, ensuring that the product meets strict safety and performance requirements for underground coal mine applications.

In terms of international alignment, CMAC certification is functionally comparable to global mining and hazardous area safety systems such as:

MSHA (Mine Safety and Health Administration, USA) approvals for mining equipment safety compliance

ATEX Directive (EU 2014/34/EU) for equipment used in explosive atmospheres

IECEx system for international hazardous area explosion protection certification

However, CMAC is specifically designed for coal mining safety regulation in China, focusing on underground operational safety, material durability, and performance reliability in harsh mining environments.

Products certified under CMAC are officially permitted for use in coal mine operations in China, ensuring compliance with national mining safety regulations.