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| Subject | English | Russian |
| med. | the first effect | иметь преимущество (Leana) |
| med. | the first effect | первично (The doctirine of double effect. The fist effect is to save the mother´s life, the second (double) effect is to .... Leana) |
| mil., tech. | the vapor from the first effect | пар, образующийся в первом испарителе (многокамерной опреснительной установки) |