this article discussed the action of emergency overflow-oil callback and cleanning of our rescue sysytem at sea from the harm of the overflow-oil accident,the current of the world overflow-oil accident,the risk of ours overflow-oil and the management and special ability of our rescue system.

Practice on PCI gas supply system's improving and producing;

The causes of the failures are analyzed from the aspects of structure and working principle and installation of the gas supply system,and counter measures for the troubles are expounded.

Firstly the conversion of the engine structure on the basis of the original diesel engine is introduced, which retains the complete settings and functions of the diesel engine, only with addition of the natural gas supply system and the adapter.