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.
Rock removal is the process of removing rocks from your property. This could be surface rock, or rock that is buried underneath the ground. Both types of rocks can cause problems if you are intending to build or landscape in any way. Rock removal is done using specialised equipment such as excavators, bobcats, tippers, track rakes, rock pickers, rock loaders, and trucks.