機器
blade
chart
construction
cut
electric
engineering
equipment
factory
flame
graph
grind
grinder
grinding
growth graph
hand
heat
hot
human
industrial
industry
investment
iron
manufacture
manufacturing
metal
metalworking
money
person
pipe
power
production
profit growth
progress
protection
safety
saw
spark
steel
technical
technology
tool
welding
wheel
work
workshop