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21. | pin-connected joint |
| 铰节点 |
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22. | originating node |
| 源节点 |
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23. | lower-chord panel point |
| 下弦节点 |
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24. | destination node |
| 目的节点 |
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25. | child node |
| 子节点 |
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26. | top node of tree |
| 树顶节点 |
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27. | nodal point keying |
| 节点键控 |
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28. | king post joint |
| 中柱节点 |
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29. | nodal potential |
| 节点势 |
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30. | destruction of a node |
| 节点破坏 |
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