An explosion-proof lighting switch? For the environment and use? Proof lighting switch Scope constituencies meaning? Product Features? The main technical parameters A, good contact, the insertion depth of not less than 2/3 of the width of the knife, the contact area of ??not less than 75 toolholder [%] B, moving knife opening and closing position, direction of motion of the handle strictly coordinated .C, shell-proof switch manufacturers no distortion, no open welding, no rust proof switch, bracket without serious distortion D bk-proof switch operation handle in the correct position, pulled flexible shaft firmly connected with the operation, no virtual action E, vacuum contactor contact good contact proof switch models, no oxidation discoloration interrupter interior parts, vacuum level compliance, no serious signs of discharge Mine Explosion Switch, 20-year corporate integrity Koretoyo proof (certified), Jinzhong Koretoyo explosion proof switch from Zhejiang Electric Co., Ltd. Tianjin offices. Zhejiang Koretoyo explosion-proof electrical Ltd. Tianjin Office (www.tjfangbao.com) is Tianjin, explosion-proof lighting leader, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs . Koretoyo explosion in leadership with the staff warmly welcome all inquiries to discuss, but to create a better future abundance of proof.