英文關鍵字
angle
asia
asian
blade
china
chinese
come
concrete
constructing
construction
cut
cuts
cutting
drill
drilling
drills
electric
floor
fly
flying
frame
from
girder
gloves
grinding
hard
hat
holes
into
iron
machine
makes
making
metal
nanjing
onto
out
piece
power
ripped
rips
saw
sawblade
sawing
shavings
slice
slicing
sparking
sparks
steel
the
using
wearing
with
worker