各国综合卷主要包括各国电力部（水电部、能源部）等政府部门的重要文件；

The main countries of a comprehensive volume including the Ministry of Electric Power (Ministry of Electricity and Water, Department of Energy) and other important documents of government departments;

也门 水井项目是长城钻 井公司独自开发的国际项目中较早的一个，业主是也门国家 水电部。

The water well project in Yemen is an early international drilling project that carried out by Great Wall Drilling Co.