機器
advanced
bars
cables
caution
close
closeup
current
design
detail
digging
engine
engineering
ergonomics
excavator
factory
focus
handles
holder
hose
industrial
industry
iron
machinery
machining
make
manufacture
mechanism
metal
new
off
operator
piece
pipe
precisely
process
production
protection
quality
roller
screws
steel
strictly
switches
technology
tool
work
yellow