| |||
closed design | |||
closed architecture | |||
closed construction; enclosed construction | |||
| |||
closed construction |
封 闭结构 : 11 phrases in 6 subjects |
Bridge construction | 1 |
Cycling other than sport | 1 |
Ecology | 1 |
Electronics | 1 |
Technology | 6 |
Textile industry | 1 |