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一级测站 | |||
主站 | |||
一等测站; 一等测点; 主要观测站; 主测站; 基本站 | |||
主控站 |
primary station : 31 phrases in 9 subjects |
Aviation | 1 |
Earth sciences | 2 |
Electronics | 3 |
Hydroelectric power stations | 2 |
Information technology | 2 |
Refrigeration | 1 |
Space | 4 |
Technology | 15 |
Telecommunications | 1 |