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| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| GB/T 11737-1989 |
Standard method for hygienic examination of benzene，toluene and xylene in air of residentialareas--Gas chromatography 居住区大气中苯、甲苯和二甲苯卫生检验标准方法 气相色谱法 |
China National Standards benzene，toluene |
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