英文關鍵字
broadband
cable
cabling
communication
connecting
connection
contractor
domestic
engineer
equipment
fiber
hardhat
health
height
high
industry
infrastructure
install
installation
ladder
maintenance
man
network
occupation
operative
optic
optical
outdoor
person
ppe
repair
repairing
residential
roof
safety
service
specialist
speed
technician
technology
telecom
telecommunication
upgrading
utility
visibility
viz
work
worker
workman