英语词汇“roller jewel”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典-现代词典

单词	roller jewel
释义	roller jewel noun : a usually ruby or sapphire pin set upright in the roller disk and pushed by the pallet fork — called also impulse pin
随便看	gasometer gasometric gasometrically gas-operated gasp gas packing gasper gaspereau gaspergou gaspiness gasping gasping disease gaspingly gas pipe gas plant gas plate gas pliers gas pool gas port gas producer gasproof gaspy gas refrigeration gas retort gas ring

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