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与"helical spring"相近的词条

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• helical reservoir
• helical scan
• helical scan recorder
• helical scanning
• helical sheath
• helical spring
• helical structure
• helical symmetry
• helical symmetry virus
• helical thickening
• helical tube
• helical virion
• helical virus particle
• helicalflight
• helicalstructure
• helicase

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