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betaine amphoteric surfactant
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betaine amphoteric surfactant
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甜菜碱表面活性剂
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betaine amphoteric surfactant
甜菜碱表面活性剂
由季铵盐型阳离子部分和羧酸盐型阴离子部分构成的表面活性剂。
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asphalt storage tank
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Aspherical Lens
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asphyxiating gas poisoning
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aspirated sound
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