1.1 Wear a protective mask when working with your face up. Wear safety goggles for eye protection when drilling holes in cast iron castings.
1.2 The drill holder should be properly installed.
1.3 When the drill bit is in a hot state during operation, care should be taken to burn the skin.
1.4 When drilling a hand-held electric drill with a diameter of Φ12mm or more, a pistol drill with a side handle should be used.
1.5 When working on a ladder or working at a height, measures for falling from a height should be taken, and the ladder should be supported by ground personnel.
