один за другим

. в приведённом порядке; по одному; по очереди; последовательно

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By the early 20th century experimental and theoretical developments were appearing at a rapid pace (or one after another).

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Fragment ions of different masses are "focussed" through the exit slit in turn.

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Telegraph cables on the flat sea floor were broken one by one.

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Numerous other solid-state laser materials were discovered in rapid succession.

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The use of each system will be discussed in turn (or by turns).

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Large quarry and tunnel blasts require that the charges be detonated in sequence (or sequentially).

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The welding passes are made one after the other.

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These missiles can be fired repetitively almost as fast as a bolt-operated rifle.

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The sets of coils may be subjected simultaneously or successively to the inducing action of the field magnets.