If the valve body material can be welded, but very different thermal expansion coefficient, or changes in operating temperature rangeof a larger thread junction closure weld must be honey.
When the coefficientof soil pressure at-rest varies in proper range, the influence on the horizontal displacement of the excavation can reach 20%.
适当范围内对静止土压力系数进行的不同取值，对挡墙的水平位移的影响可达20%左右。
3
The algorithm constructs matrixes by using covariation or covariation coefficient and estimates bearing and rangeof near-field sources by rooting method.