![]() |
| |||
basic file | |||
basic instrument; Basic Documents | |||
elementary file; base document | |||
basic document | |||
keystone document |
基本文 件: 20 phrases in 10 subjects |
Audio electronics | 1 |
Business | 1 |
Cartography | 1 |
Electronics | 7 |
Geology | 1 |
Name of organization | 1 |
Securities | 1 |
Space | 3 |
Technology | 2 |
Telecommunications | 2 |