Section R. 408.11406 - Definitions; PRule 1406.
(1) "Passageway" means a path of travel for foot traffic only.(2) "Pinch point" means a point at which it is possible to be caught between moving parts of a machine or between moving and stationary parts of a machine, or between the material and any part of a machine.(3) "Pneumatic conveyor" means a system of tubes or ducts through which objects or bulk materials are conveyed by a pressure or vacuum system. See figure 5.(4) "Portable conveyor" means a transportable conveyor, usually having supports which provide mobility. See figure 6.(5) "Pulley" means a wheel, usually cylindrical but sometimes polygonal in cross section, with the wheel's center board for mounting on a shaft and used to transmit power or change direction.Mich. Admin. Code R. 408.11406