英文關鍵字
accident
are
asphalt
bar
cable
cables
cabling
chain
channel
city
communal
communication
communications
construction
cut
cutter
cutting
destruction
device
digging
dismantle
drainage
drilling
electric
emergency
engineering
equipment
excavator
gravel
heavy
hydraulics
industrial
industry
laying
machine
machinery
maintenance
men
metal
movement
pipe
pit
plumbing
power
powered
process
reconstruction
remove
repair
replacement
road
service
special
street
supply
telecom
tool
trade
transfer
trench
unit
winter
work
workers