機器
aid
air
alarm
alert
ambulance
art
assistance
automobile
boat
car
care
emergency
engine
equipment
first
guard
helicopter
help
hospital
illustration
isolated
life
medical
medicine
motor
operation
red
rescue
safe
safety
saving
sea
service
set
ship
siren
special
specialized
squad
survival
transport
transportation
truck
urgency
urgent
van
vehicle
white