Laboratories can often have some pretty sophisticated pieces of equipment. Certain kinds of equipment can be so important that they maintain a pretty much constant presence from lab to lab. Regardless of whether that lab is geared more toward pure scientific research or whether it tends to focus more on the practical side of engineering and design. Without question, laminar airflow hoods are one of these mainstays.
Laminar airflow hoods (often also called laminar flow benches or workstations) are special tools meant to prevent particulate contamination in experimental settings. Each one typically consists of a workbench enclosed by a stainless steel cabinet and further surrounded by glass or some similar tough but transparent material. One side of the enclosure also contains an opening, allowing a researcher to reach in and perform whatever work he needs to within that sterile environment.