water storage level gauge in stairs

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energy efficient home in Taoyuan DSC_4564

water storage level gauge in stairs

Camera/lens: NIKON D40, 18-55mm f/3.5-5.6
Aperture: 4.0, Shutter speed: 1/60, Focal length: 18.0 mm, ISO: 200, Bias: 0
Date/Time: 2009:02:22 11:04:04
Average color: gray44