7 Hydraulic and air clutches other than for land vehicles, namely, clutches for machines and industrial equipment; mechanical and hydraulic power take-off devices for engines other than for land vehicles; reduction gear units for reducing the speed of machine motors other than for land vehicles; marine transmissions, namely, transmissions for boats; hydraulic torque converters other than for land vehicles; power-shift transmissions other than for land vehicles; gear boxes other than for land vehicles; marine propulsion mechanisms other than for land vehicles, namely, water jet drives for motors; machine drives for marine and engine purposes; trim tabs for marine vessels; hydraulic systems other than for land vehicles, namely, hydraulic controls for boats, machines, industrial equipment, motors and engines for controlling the above goods, and replacement machine parts for all of the above; marine management systems apparatus and instruments for nautical purposes, namely, marine gears, marine engine parts, clutches, pump drives, and torque converters; structural parts of marine vessels, namely, marine transmission engine blocks and housings; torque converters for marine propulsion mechanisms, namely, propellers; propulsion mechanism for marine vessels, namely, water jet drives and power take-off units