angles board chips circuit circuit-board colored coloured communication components computer connected connections cpu diodes disconnected dusty electrical electronics equipment gadgetry green inside internal linked links metal microchip microprocessor miniature mother-board numbered numbers panel part parts perspectives plastic plastics printed-circuit processor small surface surfaces switches technology transistors aerospace air aircraft aviation axle blade blades bolt chopper close-up closeup color detail engineer engineering flight fly flying hazard head heavy helicopter industry machine mechanics mechanism power powerful propeller rivet rotate rotating rotation rotor speed spin steer top transport transportation turn turning vehicle wing bolted circular coil coiled coils component electronic-component essential exposed fixed hard magnetic magneto-coil movement moving-parts open opened product round screws wired wires wiring access alert authorities authority availability available boat boating-control communicating control deployment fast flag foam froth Hong-Kong law law-&-order light naval observation on-duty on-the-job order patrol patrolling presence regulations responsibility responsible sea secure security wake water watercraft white badges barriers bilingual cars distinctive emergency-vehicle flashing-lights lights marked motor-vehicle police police-vehicle symbols traffic traffic-control travel van adjustable adjusted antique-like bedroom bedside bright bulb colorful colourful decoration decorative design electric electricity furniture glass glow glowing golden home illuminated illuminating illumination indoors interior lamp lampshade metallic modern regulated shine shining style styles surfacing texture textured textures thick thin touch active activities adventure adventure-playground boy children children’s-playground climbing climbing-nets climbing-ropes colors colours families fun ground kids leisure nets netting park parkland peaceful perspective plants playground playing posts public quiet relaxing roped ropes shade shadows sunlight sunshine tranquil trees views aeration clouds club rooms community cricket ground dark skies grass grassed area greens lawn aeration machinery maintaining maintenance men mowing oval playing field preparation preparing renovating renovation sporting area sports field sports oval suburban suburbs tennis courts track trail truck utility vehicles walkers work working workmen bouncer bouncing bouncing-seesaw coloration colour four-seater frogs greenery horses parks play seesaw shaded shady shiny springing springs