英文關鍵字
ancient
armature
brass
cleanliness
cleanness
close
coarse
corps
detail
driving
equipment
filter
filtering
filtration
fitted
flowing
highway
housing
hull
industry
metal
net
north
object
part
paved
percolation
pipe
product
road
rough
russia
single
stone
surface
the
underfoot
underfootn
water
waterpipe