These joints feature complex shapes and sizes, high requirements, heavy weight and very difficult manufacture.

这些铸钢节点形状复杂、要求高、质量大，制作难度大。

youdao

These joints feature complex shapes and sizes, high requirements, heavy weight and very difficult manufacture.

这些铸钢节点形状复杂、要求高、质量大，制作难度大。

youdao