与"hard water"相近的词条

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• hard tubercle
• hard type surfactant
• hard ulcer
• Hard vocal attack
• hard ware
• hard water
• hard water soap
• hard water syndrome
• hard water treatment
• hard wax flux
• hard white exudate
• hard-wire connection
• hard wood
• hard X-ray
• hard x-ray imaging spectrometer
• hard X-rays

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