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

If the product has applied for coal safety certification, you can apply for a new one using the original testing report. You need to go through the application process again, but the time and cost will be greatly reduced.

So, how can I apply for coal safety certification when I have mine safety certification?

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