Coal mine explosion-proof electric hammer is a sign MA
The explosion-proof electrical products imported from abroad must be examined and approved by the explosion-proof quality inspection institutions in our country;Carefully distinguish between fake and shoddy products. The main performance of the label is no explosion proof, certificate number, forged explosion-proof certificate number, no manufacturer, rough workmanship.
Explosion-proof products have signs and signs, signs (nameplates or warning cards) are made of copper. In addition to the product model, specifications, manufacturer name, date of manufacture or factory number, the contents of the mark include "Ex" sign, explosion proof sign and explosion proof certificate number. Mine explosion-proof electrical products should have "Ex" sign, "MA" sign, explosion proof sign and explosion proof certificate number, and MA coal mine safety mark quasi certificate number;
