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| 阶状断块; 阶状岩块 | |||
| 级形垫铁; 多级滑轮; 阶梯形垫铁; 台阶形垫铁; 多组滑轮; 挡土坎 | |||
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step block : 11 phrases in 8 subjects |
| Bodybuilding | 1 |
| Communications | 1 |
| Electronics | 2 |
| Navigation | 1 |
| Rail transport | 1 |
| Technology | 3 |
| Telecommunications | 1 |
| Wushu | 1 |
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