harden up
4.Finally,the phenomenon of diameter decrement of the alignment valve , the work-harden and the heatingi-up are expeained.
6.In recent years Binzhou Cityhas been paying attention to the application of expenditure benefit appraisal method,but only at preliminary level. A special expenditure benefit appraisal organization isneeded to progressively set up a scientific expenditure benefit evaluation index systemand to harden the engagement of the benefit appraisal result of expenditures.
