Dough brakes or cracker machinery or any description. Wire or iron straightening or drawing machinery. Rolling mill machinery. Power punches or shears. Washing or grinding or mixing machinery.
Calendar rolls in paper and rubber manufacturing or other heavy rolls driven by power.
In the operation or management of hoisting machines. In oiling or cleaning hazardous machinery in motion. In the operation or use of any polishing or buffing wheel. As a brakeman, fireman, engineer, motorman or conductor upon a railroad or railway. As a fireman or engineer upon any boat or vessel.