機器
blade
circle
circular
construction
cut
dangerous
device
diamond
disc
electric
electrical
engineering
equipment
factory
flash
grind
grinder
hand
hazardous
hot
industrial
industry
instrument
iron
labour
light
manual
manufacture
manufacturing
mechanic
metal
modify
power
production
protection
repair
rotate
rpm
safety
spark
speed
steel
technology
tool
turning
wheel
work
worker
workshop