| |||
coving | |||
vault | |||
cylindric vault; cylindrical vault; vaulting | |||
barrel arch; barrel vault; barrel vaulting | |||
| |||
barrel arch |
筒 拱: 98 phrases in 9 subjects |
Architecture | 7 |
Bridge construction | 1 |
Construction | 1 |
Electronics | 1 |
General | 1 |
Hydroelectric power stations | 11 |
Metallurgy | 1 |
Technology | 74 |
Water resources | 1 |