查询词典 petroleum grease

A flammable colorless gaseous alkene; obtained from petroleum and natural gas and used in manufacturing many other chemicals.

一种无色易燃的气态烯烃，从石油和天然气中提取，用于制造其他许多化学品。

Methods: from prepation of crude drug as start, study the technology of extract and defat with L9 (3~4) orthogonal test. With EtOH extraction and water sed, alkali washing, EtOAC extraction as main methods of eliminate dopant. Finally with alky AlzO3 chromatographic column, rich and gain anticancer active site. The maximum response was achieved at a 40 min extracting time with 10 times volume 90% EtOH added to the sample for the first time and 30 min for the second time. Adding 10 times water will produce precipitation; Place the precipitation into 6 times petroleum benzin to de-fat at 60℃.

云南红豆杉中抗癌活性物制备工艺研究方法：利用正交设计试验L9(3~4)确定原料药提取工艺为：10倍量90％乙醇提取两次，第一次40分钟，第二次30分钟；醇提液用10倍量水沉；沉淀加6倍量石油醚40℃脱脂；用1mol／L的NaOH溶液碱洗，除去酸性杂质；以碱性氧化铝柱，以环己烷／丙酮为洗脱溶剂，在环己烷-丙酮(6：4)段富集到所需活性部位，洗脱剂用量为3VB。

It's the real alternative to petroleum.

这是真正的可取代石油。

He worked for the American Petroleum Institute.

他在美国石油协会工作

The Company passed American petroleum institute API Spec7-1 product authentication and ISO9001:2000 quality management system certification.

公司通过了美国石油学会API Spec7-1的产品认证和ISO9001：2000质量管理体系认证。

Had passed through API American Petroleum Institute Quality Management System Certification.

已通过美国石油学会API质量管理体系认证。

Holders of the American Petroleum Institute "API Certification","ISO 9000 quality system certification."

持有美国石油协会《API认证证书》、《ISO 9000质量体系认证证书》。

Holders of the American Petroleum Institute "API Certificate","ISO 9000 Quality System Certification."

持有美国石油协会《API认证证书》、《ISO 9000质量体系认证证书》。

In January 1994 made the American Petroleum Institute API quality certification.

1994年1月取得美国石油协会API质量认证。

A pipeline design method is discussed and the famous American Petroleum Institute pipeline standard is also introduced.

探讨管系设计方法和介绍著名的美国石油学会管系标准。

We are in a good position to meet your requirements.

我们完全可以满足你方的需求。

We are all pervade d with a sense of disaster.

我们普遍有大祸降临的感觉。