Levelling staffs (surveying instruments); Logs (measuring instruments); Measuring instruments; Gauges; Detectors; Surveying apparatus and instruments; Measuring devices, electric; Measuring apparatus; Revolution counters; Optical apparatus and instruments; Relays, electric; Sockets, plugs and other contacts (electric connections); Inverters (electricity); Cell switches (electricity); Switches, electric; Connectors (electricity); Inductors (electricity)

'apparatus':13,20,24 'cell':38 'connect':35 'connector':43 'contact':33 'counter':22 'detector':11 'devic':17 'electr':18,28,34,37,40,42,44,46 'gaug':10 'inductor':45 'instrument':4,7,9,15,26 'invert':36 'level':1 'log':5 'measur':6,8,16,19 'optic':23 'plug':30 'relay':27 'revolut':21 'socket':29 'staff':2 'survey':3,12 'switch':39,41

EELCO

Owner

Goods & Services