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quaternary ammonium salt
quaternary ammonium spasmolytic drug
quaternary ammoniun compounds
quaternary carbon atom
quaternary cationics
quaternary code
quaternary compound
Quaternary deposit
quaternary diagram
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quaternary cationics
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quaternary cationics
Definitions
[1]
[化]
季盐阳离子表面活性剂; 季铵盐阳离子表面活性剂
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