9
Measuring, signalling and checking (supervision) apparatus and instruments in the field of flow meters, current monitors and current indicators for liquid and/or gaseous media, flow meters and flow indicators for liquid and/or gaseous media, in particular for oils or air, impeller flow meters, screw volumeters, paddle-type current monitors for liquid and/or gaseous media, flow restrictors, volume flow blocks, contact protection relays, and accessories for the aforesaid goods
37
Installation of measuring, signalling and checking (supervision) apparatus and instruments in the field of flow meters, current monitors and current indicators for liquid and/or gaseous media, flow meters and flow indicators for liquid and/or gaseous media, in particular for oils or air, impeller flow meters, screw volumeters, paddle-type current monitors for liquid and/or gaseous media, flow restrictors, volume flow blocks, contact protection relays, and accessories for the aforesaid goods; Maintenance and repair for others of measuring, signalling and checking (supervision) apparatus and instruments in the field of flow meters, current monitors and current indicators for liquid and/or gaseous media, flow meters and flow indicators for liquid and/or gaseous media, in particular for oils or air, impeller flow meters, screw volumeters, paddle-type current monitors for liquid and/or gaseous media, flow restrictors, volume flow blocks, contact protection relays, and accessories for the aforesaid goods
42
Engineering, Technical measuring and testing