погружение
• Neither on this dive, nor on others ... (of frogmen).
• They regretted the brevity of their plunge (in a bathyscaphe).
• The record submersion (or submergence) (of a submarine) ...
• The process of downsinking of the plate beneath the edge of another is called subduction.
Источник:
Русско-английский научно-технический словарь
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