英文關鍵字
activity
bucket
build
building
carpentry
cement
closeup
concrete
concreting
construct
construction
crew
employment
equipment
flowing
gray
hand
handwork
industry
job
machine
machinery
making
manual
mason
masonry
material
mechanics
mix
mixed
mixer
mixing
mortar
motion
pour
preparation
prepare
production
rod
site
structure
tool
trowel
video
water
wet
work
worker
workman