Apparatus for use in mining, namely, mining machines; heavy industry machines, namely, earth moving machines, mining machines, line haulers; hydraulic apparatus for controlling the operation of machines, namely, hydraulic pumps, hydraulic power units, hydraulic gate openers; manual apparatus for controlling the operation of machines, namely, hoists, pulleys being parts of machines, pressure switches as parts of machines; pneumatic apparatus for controlling the operation of machines, namely, p...