In this paper, pitch—based spherical activated carbon(PSAC)was modified by the air—oxidation treatment.

利用空气氧化处理法对沥青基球状活性炭进行了改性。

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We have ISO9001:2000 certificate and also member of Pesticide Science and Administration of China (PSAC).

我们已通过ISO 9001： 2000证书，并兼任农药科学和管理的中国(psac)。

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PSAC member companies represent over 80 per cent of the business volume generated in the petroleum services industry.

球状活性炭的成员公司代表超过百分之八十的业务量中产生的石油服务行业。

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