How to apply for another mine safety certification after obtaining a coal safety certification?

If the product has applied for coal safety certification, it can reapply for a mine safety certification using the original testing report, which requires a new application process, but the time and cost will be greatly reduced.

So, with mine safety certification, how do I apply for coal safety certification?

If the product has applied for mining safety certification and needs to apply for coal safety certification again, it needs to be reapplied and tested like a new product.