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mask equalizing

Barotrauma — Barotrauma, otitic Barotrauma, sinus Classification and external resources ICD 10 T70.0, T70.1 ICD 9 … Wikipedia
arts, East Asian — Introduction music and visual and performing arts of China, Korea, and Japan. The literatures of these countries are covered in the articles Chinese literature, Korean literature, and Japanese literature. Some studies of East Asia… … Universalium
List of diving hazards and precautions — Contents 1 Effects of relying on breathing equipment while underwater 2 Effects of barotrauma or pressure damage 2.1 … Wikipedia
Pure tone audiometry — (PTA) is the key hearing test used to identify hearing threshold levels of an individual, enabling determination of the degree, type and configuration of a hearing loss. Thus, providing the basis for diagnosis and management. PTA is a subjective … Wikipedia
telecommunications media — Introduction equipment and systems metal wire, terrestrial and satellite radio, and optical fibre employed in the transmission of electromagnetic signals. Transmission media and the problem of signal degradation Every… … Universalium
Cable — For other uses, see Cable (disambiguation). 6 inch (15 cm) outside diameter, oil cooled cables, traversing the Grand Coulee Dam throughout. An example of a heavy cable for power transmission … Wikipedia
Sodium sulfate — Other names … Wikipedia