機器
access
accident
background
bolt
charge
circuit
danger
domestic
electric
electrical
electricity
electronic
equipment
factory
fix
generator
guard
hazard
icon
industrial
injury
keep
key
label
lightning
lock
locked
lockout
maintenance
mechanic
padlock
password
performing
protection
repair
restricted
safety
security
shield
shock
sign
sticker
symbol
tag
tool
unlock
voltage
warning
zone