Some welding helmets have a lot more in common with PAPR medical masks or SCUBA gear than they do with a traditional welding mask. They have various powered features, including the ability to pump in their own air supply. These…

Best rated transformer core cutting machine supplier factory: Adjustment under heavy load or short circuit conditions is not allowed: Under heavy load or short circuit conditions on the transformer, tap changer adjustment may cause arcing or excessive current, resulting in…