blade edge pine pinewood plank saw sawblade sharp steel teeth tool tools tooth balconies balcony chinese colorful coloring colors colourful colouring colours exterior exterior shutters functional louver blades louvered louvers louvre blades louvred louvres painted plantation shutters protection shelter shuttered shutters traditional window window covering window frame window shutters windows air air rescue aircraft assistance aviation blades chopper clouds emergency fast flight fly flying heli helicopter help high hover industry landing life living power propeller rescue rotor search service sky speed take-off technology transport transportation artistic helicopter approaching lift off vertical balustrade decorated decorations decorative railing sheltered dry field green macro meadow small grass grassy landscape lawn patch texture red roof stalk tile