英文關鍵字
art
auto
background
bag
best
black
brick
bricklayer
build
builder
building
bulldozer
cement
collection
compass
concept
concrete
construction
crane
design
dozer
drill
elevation
elevator
engineer
engineering
equipment
flat
forklift
graphic
group
hacksaw
hammer
hard
hardware
hat
helmet
home
house
industrial
industry
instrument
isolated
jack
line
linear
load
machine
man
measurement
metal
minimal
object
outline
paint
public
repair
sand
screwdriver
service
set
shovel
sign
single
solid
steel
structure
symbol
technology
thin
tool
tools
transportation
truck
vector
vehicle
web
with
work
worker