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Scuba / Snorkeling Attractions In San Marcelino

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San Marcelino, officially the Municipality of San Marcelino, , is a 1st class municipality in the province of Zambales, Philippines. According to the 2015 census, it has a population of 33,665 people.The municipality is home to Mapanuepe Lake that formed after the 1991 eruption of Mount Pinatubo.
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Scuba / Snorkeling Attractions In San Marcelino

  • 1. Scuba & Snorkeling Subic
    A diving regulator is a pressure regulator that reduces pressurized breathing gas to ambient pressure and delivers it to the diver. The gas may be air or one of a variety of specially blended breathing gases. The gas may be supplied from a scuba cylinder carried by the diver or via a hose from a compressor or high-pressure storage cylinders at the surface in surface-supplied diving. A gas pressure regulator has one or more valves in series which reduce pressure from the source, and use the downstream pressure as feedback to control the rate of flow and thereby the delivered pressure, lowering the pressure at each stage.The terms regulator and demand valve are often used interchangeably, but a demand valve is a regulator that delivers gas only while the diver is inhaling and reduces the gas...
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