lockring
(cycling) A threaded washer used to prevent components from become loose during rotation. They are found on a bottom bracket and a track hub.
plural of postamble
(organic chemistry, especially in combination) An alkyl organometallic radical.
(UK, Australia) The, formerly common, hobby of looking for birds' nests, often with the intention of collecting the eggs.
走行中にクランクが緩まないように、ボトムブラケットのねじ式ワッシャーを締め直した。
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