(1)[ The breaking, cutting, dressing or carrying of bricks, stone, concrete, slag or similar material by means of a hammer, a chisel, pick or similar hand tool, or by means of a portable tool driven by mechanical power and the dry grinding of surface of any such materials by means of a wheel or disc driven by mechanical power, where in any of the foregoing cases Particles or fragments are liable to be thrown off towards the face of the operator in the course of the process.] [Substituted by Punjab Government Notification No. G.S.R.85/CA 63/48/Section 112/Amd. (16)/77, dated 5th August, 1977.]
