英文關鍵字
big
blender
boots
boss
builder
building
business
cement
chute
civil
concrete
construction
contractors
crew
curb
deliver
engineering
equipment
foreman
form
gutter
hard
hardhat
hat
heavy
labor
level
material
mixer
outdoor
project
road
safety
shovel
site
slab
structure
superintendent
transportation
trowel
truck
work