ball structure
短语词组
- parting ball structure 剥球构造
- ball -like structure 球状结构
- ball face sealing structure 球面密封结构
- parting -ball structure 剥球构造
- ball and socket structure 关节构造
- ball structure parting 球状节理
- node ball of grid structure 网架节点球
- Twin ball -like structure 孪生球状结构 返回 ball structure