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optima, optimal, optimality, optimaltrajectory, optimat, optimatic, optime, optimeter, optimetertube, optiminimeter,

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蜗杆, 蜗杆传动, 蜗杆和蜗轮, 蜗杆止推轴承, 蜗杆轴承, 蜗杆锥棍轴承, 蜗管, 蜗壳, 蜗轮, 蜗轮减速机,

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optimumtrajectory, option, optional, optionally, optionee, options, optiphone, optoacoustic, optochin, optoelectronic,

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蜗杆, 蜗杆传动, 蜗杆和蜗轮, 蜗杆止推轴承, 蜗杆轴承, 蜗杆锥棍轴承, 蜗管, 蜗壳, 蜗轮, 蜗轮减速机,

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optophone, optotransistor, optotype, OPTRAC, optron, optronics, opulence, opulent, opulently, opuntia,

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蜗杆, 蜗杆传动, 蜗杆和蜗轮, 蜗杆止推轴承, 蜗杆轴承, 蜗杆锥棍轴承, 蜗管, 蜗壳, 蜗轮, 蜗轮减速机,

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or rather, or so, or whatever, Ora, oraceratubae, oraceroris, orach, orache, oracle, oraconaris,

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蜗杆, 蜗杆传动, 蜗杆和蜗轮, 蜗杆止推轴承, 蜗杆轴承, 蜗杆锥棍轴承, 蜗管, 蜗壳, 蜗轮, 蜗轮减速机,

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orale, orality, oral-lateral, orally, oraltoxicity, Oran, orang, orange, orange brown, Orange Free State,

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蜗杆, 蜗杆传动, 蜗杆和蜗轮, 蜗杆止推轴承, 蜗杆轴承, 蜗杆锥棍轴承, 蜗管, 蜗壳, 蜗轮, 蜗轮减速机,

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oranges, orangewood, orangey, orangish, Orangism, orangite, orangoutang, orangutan, orang-utan, orangutang,

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蜗杆, 蜗杆传动, 蜗杆和蜗轮, 蜗杆止推轴承, 蜗杆轴承, 蜗杆锥棍轴承, 蜗管, 蜗壳, 蜗轮, 蜗轮减速机,

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oratorio, oratorize, orators, oratory, oratress, orature, orb, orbed, orbenin, orbfish,

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蜗杆, 蜗杆传动, 蜗杆和蜗轮, 蜗杆止推轴承, 蜗杆轴承, 蜗杆锥棍轴承, 蜗管, 蜗壳, 蜗轮, 蜗轮减速机,

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orbital plane, orbitale, orbiter, orbiting, orbitocranium, orbitography, orbitoid, orbitonometer, orbitonometry, orbitostat,

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蜗杆, 蜗杆传动, 蜗杆和蜗轮, 蜗杆止推轴承, 蜗杆轴承, 蜗杆锥棍轴承, 蜗管, 蜗壳, 蜗轮, 蜗轮减速机,

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orchal, orchard, orchard grass, orcharding, orchardist, orchardman, orchards, orchectomy, orchestic, orchestra,

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蜗杆, 蜗杆传动, 蜗杆和蜗轮, 蜗杆止推轴承, 蜗杆轴承, 蜗杆锥棍轴承, 蜗管, 蜗壳, 蜗轮, 蜗轮减速机,