 |
| |||
| prior to (prior to 1943, heavy water was produced by electrolysis of water) | |||
| before 1948, transistors were unknown | |||
|
до ... года : 258 фраз в 46 тематиках |
|
| |||
| prior to (prior to 1943, heavy water was produced by electrolysis of water) | |||
| before 1948, transistors were unknown | |||
|
до ... года : 258 фраз в 46 тематиках |