Definition of hand gear in English:
hand gear
noun
1Apparatus operated by hand, especially for controlling an engine; specifically a system of hand-operated levers for opening or shutting the valves of a steam engine.
2Apparel (especially of a protective nature) for the hands.
Origin
Early 19th century; earliest use found in Journal of Natural Philosophy, Chemistry and the Arts.
Are You Learning English? Here Are Our Top English Tips