Eng

Gear...

輪

Alternate, Cycle, Gear, Recur, Rotate, Stately, Take turns,, Turn, Wheel

器材

Apparatus, Device, Devices, Equipment, Gear, Instrument, Instruments, Piece of, Pieces of

裝置

Device, Gear, Install, Installation, Installed, Installing, Installs, Plant, System, To install

機關

Gear, Institution, Mechanism, Organization