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| P2 ヘッダー (A hidden section of an e-mail message. From the time a message is first created, information about it is added to the message header, including technical details, such as who created the message and the software used to compose it) | |||
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P2 : 4 фразы в 2 тематиках |
| Майкрософт | 2 |
| Химия | 2 |