Free illustration materials

• 
  Sphygmomanometer
• 
  Priority elevator
• 
  Mail order trouble (machine-female)
• 
  Microphone mark
• 
  Charging plug for electric vehicles
• 
  Antikythera mechanism
• 
  Amateur radio (female)
• 
  Uncanny valley phenomenon
• 
  Water meter receiver
• 
  Telephone pole-Telegraph pole
• 
  River camera
• 
  TV showing sandstorm
• 
  Public telephone booth
• 
  Tiller
• 
  Lightning rod
• 
  Board
• 
  Security camera character
• 
  Scanning electron microscope
• 
  Micropipette
• 
  Loudspeaker-Megaphone
• 
  Thermometer-Hygrometer
• 
  Artificial dialysis
• 
  A person who wears protective clothing and sprays pesticides
• 
  Person who swipes a card to a card reader (male)
• 
  Cigarette vending machine
• 
  Crane
• 
  Water server
• 
  Road loader
• 
  Person who unplugs on thunder day (accident)
• 
  Person with ear monitor (female)

• 
  Various pedestrian crossings, traffic lights and pedestrians (girl)
• 
  Thermometer
• 
  A person who calls a nurse with a nurse call
• 
  A person who makes weapons with a 3D printer
• 
  Factory tour
• 
  Spraying pesticides
• 
  TV with color bars
• 
  Various LED traffic lights
• 
  Switch (Switch ON-Switch OFF)
• 
  Dome-shaped security camera
• 
  Factory worker operating the machine
• 
  Car battery