To complement my "First Responders Three" I decided to add line art vehicles of police car, fire truck, and ambulance. Two of the three images in this file were previously uploaded though the fire truck is slightly modified.
警察消防EMS
ambulance、emergency、ems、fire、police、responder、truck、vehicle
救護車、急、EMS、火、警察、回應、卡車、車輛
資料來源：openclipart ( https://openclipart.org/ )