英文關鍵字
compaction
gravel
sub-base
jumper
compactor
foot
operator
drives
machine
that
compacts
bottom
layer
for
laying
paving
stones
frog
engine
英文關鍵字
compaction
gravel
sub-base
jumper
compactor
foot
operator
drives
machine
that
compacts
bottom
layer
for
laying
paving
stones
frog
engine