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英文關鍵字
heap
metal
mountain
cable
industrial
technology
machine
river
industry
structure
job
make
shipment
production
sand
mechanism
mounting
rope
hill
crane
hoist
installing
pile
loading
scoop
factory
port
raise
pull
rigger
machinery
of
floating
unloading
harbour
functional
operation
enterprise
haul
workday
labor
outrigger
labourer
lading
dipper
fabricate
operational
operative
functioning
enhanced