1. The manufacturer prepares technical information and samples;
2. Carry out the test;
3. Factory inspection is required for the first application; (manufacturers who have obtained ISO9000 and other quality system certificates issued by EU national certification bodies do not need to do factory inspection in principle)
4. The test report and manufacturer's technical information are submitted for review;
5. Issuance of certification by the European national transportation department (certification agencies may conduct regular or irregular follow-up factory inspections on certified product manufacturers);
