英文關鍵字
bitumen
bituminous
black
builder
building
built
business
coating
construction
contractor
cover
covering
damp
flexibility
flexible
floor
home
impermeable
impregnated
industrial
industry
installing
insulation
maintenance
material
overhaul
person
protection
recovering
recovery
renovate
repair
repairing
repairman
roof
roofing
rubber
ruberoid
skill
tar
technician
technology
water
waterproof
waterproofing
weld
work