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O-ring
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A rubber washer that is round instead of flat. used in valve stems to create a watertight seal.
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Watertight, английский
- Водонепроницаемый
- Fitted, sealed, or constructed so as to be impervious to penetration by water.
- A borehole in which the conditions are such that no loss of the circulated drill fluid occurs.
- A connection, container, or rock strata so tight as to be impermeable to water. 536427 o—60——7
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Overexertion, английский
Doing too much physical work or taking too much exercise
Oral inflation, английский
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