Construction machines and apparatus, namely, interference prevention devices for hydraulic excavators that restrict movement of an arm or boom of an excavator, safety devices that prevent the overturning of hydraulic excavators, boom length detection devices that measure movement of a boom for truck cranes, load detection devices that measure loads on a boom for truck cranes, angle detection devices that measure the relative angle of a boom for truck cranes, moment limiters that measure stresses on a boom for truck cranes, and multiplex transmission devices that interconnect sensors for truck cranes, all being machine parts; vibration conveyors; linear motor type conveyors; semiconductor wafer transfer robots; semiconductor wafer transfer load ports; AC motors and DC motors and structural parts therefor, not including those for land vehicles; wind power electricity generators; reciprocating motors, namely, movable iron core linear actuators; small wind power electricity generators; vacuum chambers for manufacturing semiconductors; power-operated metalworking grinders; loading and unloading machines, namely, fork lift trucks, container lift loaders, belt loaders and main deck loaders; food or beverage processing machines and apparatus, namely, vibration screens for sorting foodstuff; semiconductor wafer positioning machines for use in manufacturing semiconductors; semiconductor substrate transferring machines; semiconductor manufacturing machines; hydraulic power generators; starters for motors and engines; alternators, namely, AC generators; DC generators; power transmissions and gearings for machines that are not for land vehicles; machine parts, namely, brakes that are not for land vehicles; synchronous electric generators exclusively for use in connection with railway rolling stock