56.6 MB (4.4 MB compressed)
3729 x 5304 pixels
31.5 x 45.0 cm ⏐ 12.4 x 17.7 in (300dpi)
MARTYN F. CHILLMAID / SCIENCE PHOTO LIBRARY MARTYN F. CHILLMAID / SCIENCE PHOTO LIBRARY
Oiling a bicycle chain. Woman oiling the chain of her bicycle to reduce friction and wear. Bicycle chains mesh with gears and sprockets and are essential for transferring power from the pedals to the wheels. These moving parts therefore need to be well maintained.
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