big-diameter

conducts

construction

development

efficiency

electric

electrical

electrician

electricity

energy

engineer

engineering

entries

expert

foreman

generation

generator

helmet

high-pressure

industry

infrastructure

inspection

inspector

journal

large-diameter

line

lines

log

making

man

master

occupation

person

pipelining

planning

plant

power

professional

service

station

supply

talkie

technician

technology

tower

transmission

voltage

volts

walkie

wire

wireless

work

worker

works