The effective chlorine level had a negative correlation with the storage time, use time, use frequency, and manufacture date.
有效氯含量与出厂日期、储存时间、使用时间、使用频率成反比。
The effective chlorine level had a negative correlation with the storage time, use time, use frequency, and manufacture date.
有效氯含量与出厂日期、储存时间、使用时间、使用频率成反比。
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