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| 反复荷载; 交变荷载 | |||
| 反复载荷 | |||
| 交替〔交变，反复，代用〕荷载 | |||
| 正负交变荷载 | |||
| 代用荷重 | |||
| 交替荷载 | |||
| 交变负荷; 交替载荷 | |||
| 交变载荷 | |||
| 交替加荷; 交替负荷; 交变负载 | |||
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alternate load : 5 phrases in 2 subjects |
| Aviation | 1 |
| Technology | 4 |
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