![Images of the door handle types. doi:10.1371/journal.pone.0040171.g002 | Download Scientific Diagram Images of the door handle types. doi:10.1371/journal.pone.0040171.g002 | Download Scientific Diagram](https://www.researchgate.net/publication/232281714/figure/fig5/AS:669694071685124@1536678917182/Images-of-the-door-handle-types-doi101371-journalpone0040171g002.png)
Images of the door handle types. doi:10.1371/journal.pone.0040171.g002 | Download Scientific Diagram
![Mutex Bathroom Door Lock Knob, Color Indicator for Vacant or Occupied in Use Restroom, Thumbturn, Emergency Unlock, Fits Standard 2 1/8" Doors - Amazon.com Mutex Bathroom Door Lock Knob, Color Indicator for Vacant or Occupied in Use Restroom, Thumbturn, Emergency Unlock, Fits Standard 2 1/8" Doors - Amazon.com](https://m.media-amazon.com/images/I/71eUmNlAvDL.jpg)
Mutex Bathroom Door Lock Knob, Color Indicator for Vacant or Occupied in Use Restroom, Thumbturn, Emergency Unlock, Fits Standard 2 1/8" Doors - Amazon.com
![A set of door handles for doors of different types. push handles for entrance doors, between rooms. Metal and wood. For web design. Isolated on white background. Vector illustration. Stock Vector A set of door handles for doors of different types. push handles for entrance doors, between rooms. Metal and wood. For web design. Isolated on white background. Vector illustration. Stock Vector](https://as2.ftcdn.net/v2/jpg/02/47/41/45/1000_F_247414569_uP915upuKZ6d1r7ZG34xNAdUO4a0uW4f.jpg)