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| test period | |||
| testing period | |||
| probation period (a period of testing after hiring a person; according to Soviet labor law, the testing of a production or clerical worker's fitness for a job. GSE Alexander Demidov) | |||
| probationary period (more UK hits Alexander Demidov) | |||
| trial period | |||
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| total period | |||
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| experimental stage | |||
| период испытаний: 25 phrases in 17 subjects |