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| staircase of helical type with newel | |||
| spiral stair (中柱支承悬臂踏步); spiral staircase (中柱支承悬臂踏步); staircase of helical type with newel (中柱支承悬臂踏步) | |||
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| solid newel stair | |||
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中柱螺旋式楼梯 : 6 phrases in 2 subjects |
| Architecture | 2 |
| Technology | 4 |
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