A surgical mask is used inside the operating room or during other sterile procedure areas to protect the patient environment from contamination. Surgical masks have ties so that they can be adjusted for fit, and are tied over the top of a surgical or bouffant cap.
rockfall. 1  an act or instance of the falling of rock, as in a cave-in or an avalanche. 2  a mass of rocks that have fallen: to be trapped under a rockfall.
GSIÂ® engineers and geologists have extensive experience with rockfall mitigation, stretching back to the 1960âs. Most famously, GSIÂ® founders Robert Barrett and Albert Ruckman rolled hundreds of rocks into experimental barriers as part of the research behind the Colorado Rockfall Simulation Program (CRSP).