We now write two equilibrium equations for joint d . 现在列出节点D的两个平衡方程。
2.
We now write two equilibrium equations for joint d 现在列出节点d的两个平衡方程。
3.
Note : the photo currently displayed does not 100 % reflect the actual type used on the front . we will be replacing the photo shortly with an actual product photo 注:现在列出的照片并不能反映实质的货品。我们短期内会换上产品的实际照片。