| 摘要 |
<p>Described is a diving helmet having receptacles for receiving insertable modular valves or plugs for governing gas flow. The receptacles are diametrically opposed on the helmet and are connected by gas conducting conduits. Gas may be supplied to the diver by way of a main supply duct which discharges the gas against the helmet window for defogging purposes. A sealing arrangement is provided with the diver, and particular valves or plugs are inserted into the receptacles in accordance with a particular gas supply system being utilized.</p> |
