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wall arch | |||
arc formeret; scoinson arch |
墙拱 : 100 phrase in 10 subjects |
Architecture | 9 |
Bridge construction | 6 |
Engineering geology | 3 |
Exhibitions | 1 |
General | 1 |
Hydroelectric power stations | 2 |
Metallurgy | 3 |
Port facilities | 1 |
Rail transport | 2 |
Technology | 72 |