英文關鍵字
breaking
builder
building
business
cement
concrete
construction
demolition
destroy
diamond
drill
drilling
engineer
engineering
equipment
floor
foreman
hammer
hand
hard
heavy
hole
industrial
industry
jack
job
labor
machine
maintenance
male
man
manual
men
people
person
power
profession
professional
punch
site
strong
supervisor
teamwork
technology
tool
work
worker