... -mark is Exib. 3.Explosion-proof Intrinsically Safe Automatic Telephone BOZZ KTH106-Z EXPLOSION-PROOF TELEPHONESpecificationsintrinsically safe ... quality1.AplicationKTH106-Z mining explosion-proof intrinsically safe automatic telephone is produced according to the standard Q/ ... 5)with features of explosion-proof, anti-moisture, volume small, weight light, solidity, durability, maintenance convenient.3. ...