英文關鍵字
activity
breaking
build
business
closeup
construction
craftsman
cut
destruction
dismantling
electric
electrical
employee
energy
equipment
fittings
flying
grinder
grinding
handyman
improvement
industrial
industry
instrument
iron
machine
man
metal
part
people
power
profession
professional
reinforcement
repair
repairs
service
sharpening
small
sparks
steel
technician
tool
tools
work
worker