basic scale
| topographical map
| basic scale abbr. | |
| space од. | 基本比例尺 |
| topographical map abbr. | |
| bridg.constr. | 图 |
| hydroel.st. | 地形图 |
| |||
| ★ 基本比例尺 | |||
| 基本刻度; 基本比例 (尺) | |||
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basic scale : 3 phrases in 2 subjects |
| Oil / petroleum | 1 |
| Technology | 2 |