KTH 17B intrinsically safe automatic telephone

safe automatic telephone,KTH 17B explosion-proof cell,KTH17B mine telephoneKTH 17B intrinsically safe automatic telephonechinacoal07 Product Introductionon1) KTH 17B intrinsically safe automatic telephone is not only used underground, tunnel, metal mining, chemical industrials, etc ,but also hard pollution places2) The material of cover is with features of waterproof, dustproof, anticorrosion and the protection degree IP54;3) Installation ,desk-top ,hanging type optional, by