英文關鍵字
activity
architecture
barrow
builder
building
cement
concrete
construction
contractor
dirty
effort
employment
equipment
gravel
hand
health
heavy
industrial
industry
job
labor
load
machinery
man
manual
material
metal
mix
mixer
mixing
motor
object
occupation
one
outdoor
people
pour
pouring
pours
road
safety
sand
shovel
stone
tool
transportation
wet
wheelbarrow
work
worker