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.
Highway 6 â Ongoing Rock Mitigation. Rockfall mitigation is occurring on US 6. There will be delays between mile markers 257 to 271 overnight Sunday through Friday between the hours of 10 p.m. to 8 a.m. (possibly later to clear all material from the roadway).