英文關鍵字
bailer
bucket
bulk
camera
cargo
coal
crane
cranes
dipper
factory
fill
gantry
girder
grab
granule
grapple
hangars
heap
industry
inside
ladle
large
material
materials
move
out
overhead
overload
passes
pit
plant
pour
powder
raw
safety
scoop
shop
shovel
single
special
steel
stock
storage
store
the
transfers
traveling
trough
used
warehouse
with
work
workers