英文關鍵字
working
process
mixing
concrete
foundation
private
house
cement
mortar
electric
mixer
construction
works
consisting
sand
small
stone
closeup
background
gravel
craft
machinery
prepare
dirty
wet
wall
blending
blend
outdoors
stir
mixture
machine
building
tool
job
structure
industrial
industry
builder
equipment
material
mix
work