Applications of HPLC/MS in the analysis of traditional Chinese medicines

In China, traditional Chinese medicines （TCMs） have been used in clinical applications for thousands of years. The successful hyphenation of high-performance liquid chromatography （HPLC） and mass spectrometry （MS） has been applied widely in TCMs and biolo     

China Containerization Developmenl——Port Service

Chapter Four Container Port Service Development In recent years, China＇s container ports have experienceda significant expansion both throughput and capacity.     

几种钢管拱肋弯制方法的对比及其技术的探讨

广西邕宁邕江大桥，广西三岸大桥和武汉市江汉五桥等特大跨径钢管拱桥施工过程中，对钢管拱肋弯制方法曾分别采用了多段钢管手工拼焊工艺，无缝钢管热煨弯工艺以及机械弯管工艺等，通过介绍3种加工工艺，并作技术经济性的分析比较认为，采用机械加工的控制手段先进，产品质量好，生产效率高，缺少成套机电设备的条件下，如果采用热煨弯工艺加工也能满足施工的要求，而且在工地使用较灵活方便，经济。