氟里昂替代技术 freon substitution technique
氟里昂替代品 substitutes of cfc
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药用气雾剂抛射剂CFC（氟里昂）的替代转换已成为国际药剂学研究的热点之一，我国尚未起步。
The pharmaceutical aerosol propellant CFC substitution has become a hot topic in international pharmaceutical field, but it has not been started in China.
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