井筒開關、C25315-A39、煤礦提升機專用井筒開關 西門子井筒開關C25315-A39（煤礦提升機專用井筒開關） Proximity switch C25315-A39-A SIEMENS西門子：C25315-A39德國蒂芬巴赫：TIEFENBACHesMST2/1、esMST2/2 This Proximity switch for mining and industry is flame-proof and explosion-proof as laid down in the guidelines 94/9/EG(ATEX). It is authorized for equipment in the following categories. Group I:For use in underground mine workings and above-ground installation that may be endangered by mine gas and/or coal dust. 井筒開關、C25315-A39、煤礦提升機專用井筒開關