āo miàn gǔn zǐ
concave roller
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electroluminor,
electrolyse,
electrolyser,
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electrolytic condenser,
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相似单词
凹坑,
凹孔,
凹口,
凹落,
凹面,
凹面滚子,
凹面滚子轴承,
凹面镜,
凹模,
凹刨,