 |
| |||
| sheath; duct for tendon; duct for prestressing tendon | |||
| sheath of tendon | |||
| 预应力筋套管: 4 phrases in 2 subjects |
| Bridge construction | 3 |
| Technology | 1 |
|
| |||
| sheath; duct for tendon; duct for prestressing tendon | |||
| sheath of tendon | |||
| 预应力筋套管: 4 phrases in 2 subjects |
| Bridge construction | 3 |
| Technology | 1 |