Thee potential energy difference between a unitquantity of water above‖and below the generating station.
发电站上面的单位水量与下面的单位水量之间的势能差。 。
2
In the arrangement of contents, the article first discusses the definition to "business unitquantity" and the manifestations in various fields.
在内容安排上，本文首先探讨了“业务单元数量”的内涵及在各学科内的表现形式。
3
This text, through comparison of different solutions, introduces the procedure for a project to determine the solution during selecting transformer capacity and unitquantity.