工程寿命 meaning in English

physical life

The crack of the water conservancy project building of concrete , not only influences the appearance of the project and normal running , but also threatens the security of project and shortens the life - span of project
水工混凝土建筑物的裂缝，不仅影响工程的外观和正常运行，还威胁着工程的安全，缩短工程寿命。
( 2 ) under the assumption of the service longevity of the eftwc project is 20 years ( from 1997 to 2016 ) and the annually discount rate is 6 percent , value of different year ( during the life span of engineering in the project ) are discounted to present value ( 2002 ) , the result of value of the eftwc project ' s benefits show that the total present value is 7 . 92 billion yuan
按照工程寿命20年( 1997 2016年) ，贴现率6计，工程期内各年效益价值折算到2002年末(折算基准点) ，水利富民综合开发工程效益价值的现值总额为79 . 2亿元，其中实物产出价值的现值为13 . 5亿元，生态环境效益价值的现值为65 . 7亿元。生态环境效益价值现值是实物产出价值现值的4 . 9倍。