Equipment for roasting or smelting ores.

Cord shaped substance that is entrained with black powder that when lit, burns along the cord at a set rate. Used in the ignition of explosives.

A control valve which ports oil to an actuator so the resulting output motion is proportional to the input motion to the valve.

A device whose primary function is the preservation by a porous media of insoluble contaminants from a fluid.

A valve which controls the rate of oil flow.

A condition wherein piping connections are on normally exposed surfaces of hydraulic components.