boun

However , the contents of radioactive nuclides such as uranium , radium and thorium are high in some boun coal and its products .

石煤中U、Th等放射性核素含量高，致使部分石煤及其制品中U、Th等放射性核素含量偏高。

Using the treatment of seperating layer with three-year observed data , classified the layer which has obvious turning in horizontal wind field as boun - dary layer .

运用三年的实测资料，将水平流场存在明显转折的层次定为分界层。

Using the basic equation of a plane thermoelastic problem and the stress method , the derivation of boun - dary integral equations and the single-valued conditions for the displace - ments are briefly mentioned , It is suitable for stress boundary problems .

利用应力法由平面热弹性问题的基本方程出发，简要地叙述了边界积分方程的建立，给出了位移单值条件。这种方法适用于应力边界值问题。