塞回
4.The paper mainly introluces the stretching method for tendon, reasons for retraction of male cone, the influence of male cone retraction on prestress value, and measures adopt in dealing with extra loss of prestress.
6.From the perspectives of their historical formation process, different ancient tribes such as Sai, Kesa, Huihe, Turki and Mongolian were all the possible ethnic groups acting as the factors of the now Uigur and Kazak.
7.Open VA then TC #4. If relief valve does not drip, record second check valve as "closed tight".
8.Open TC #4, then open VA. If relief valve does not drip, record second check valve as "close tight".
9.If it does not drop but there is a small leakage at test cock No. 2, then No. 1 ball valve has a small leak, but No. 1 check valve is tight.
10.If it slowly drops and does not run out through test cock No. 3, then No. 2 ball valve has a small leak, but No. 2 check valve is tight.

