upper triangular | matrix
| matrix abbr. | |
| agric. tech. | 打捆机; 粘料; 粘接介质; 矩阵粘合材料; 胶接剂 |
| hydroel.st. од. | 矩阵 |
| nucl.phys. | 基料; 封装基料 |
| soil. | 基体 |
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upper triangular : 3 phrases in 3 subjects |
| Bridge construction | 1 |
| Mathematics | 1 |
| Technology | 1 |