Their father had left two weeks ago with a wagon-load of salvage to sell in San Francisco.
两周前，他们的父亲拖着一车货物去旧金山卖，那些货全是从沉船上打捞上来的。
2
But these joined methods can not satisfy the requirement of the heavy loadwagon because of the shortcoming and self limit, therefore needs adopt the new way of joining.
但是这些连接方法由于自身的缺点和局限性，不能满足重载货车的要求，因此需要采用新型的连接方式。
3
Based on nonlinear FE software MARC, numerical simulation of BOM fastener mechanics in heavy loadwagon is studied. The key technology in constructing the finite element model is discussed.