 |
| |||
| simplex working; simplex operation | |||
| alternate operation (в обе стороны); simplex communication; up and down working (в обе стороны) | |||
| up-and-down working; alternate operation | |||
|
| |||
| simplex working; simplex operation | |||
| alternate operation (в обе стороны); simplex communication; up and down working (в обе стороны) | |||
| up-and-down working; alternate operation | |||