And belong to a clean cooking crude benzole purificatory device.

而且属于一条干干净净的焦化粗苯精制装置。

Objective: To investigate the effects of membrane separation purificatory technology on dosage and curative effect of Tangkeqing.

目的：考察膜分离精制工艺对糖渴清服用剂量及疗效的影响。

The production is washed by 95% ethanol , we can get delamination, then using butanone to extract the lower layer , the purificatory glucose ferulic acid esters can be accepted.

所得产物用95%乙醇分层，然后用丁酮萃取，得到精制的阿魏酸葡糖酯。

Attention has been paid to the safety of drinking water day and day, Let's to protect water source better, and improve disinfectant and purificatory process, in order to safeguard human health.

饮用水的安全问题日益引起重视，要加强水源保护、改进消毒工艺和净水工艺，才能保障人类健康。