communication system control | element
| element | |
| econ. | 基元 |
| hydroel.st. | 成分; 单元; 电极; 电池; 零件 |
| hydroel.st. од. | 元素 |
| math. | 集合的元素 |
| met. од. | 元件 |
| sport. | 要素 |
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| CSC | |||
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communication system control : 55 phrases in 17 subjects |