機器
action
business
circle
circular
construction
cut
cutting
danger
detail
electric
electrical
engineering
equipment
factory
grinder
hand
hands
heavy
industrial
industry
iron
light
man
manual
manufacture
manufacturing
material
mechanic
metal
people
power
process
processing
production
protection
repair
rotate
rotating
round
safety
speed
steel
technical
technology
tool
work
worker
workplace
workshop