Station of house intercom has front covering has front covering which partially covers fixing device whereby opening is a passage which is provided through which tool passes

摘要

The station of a house intercom has front covering (1) which partially covers the fixing device (4). An opening (8) is a passage which is provided through which the tool (18) passes. The fixing device is a screw or exhibits a excenter and a nut (6) which carries internal threads.