ᱥᱟᱱᱟᱢ ᱠᱷᱚᱱ ᱥᱟᱫᱷᱟᱨᱚᱱ ᱥᱟᱫᱷᱚᱱ ᱫᱚ ᱦᱩᱭᱩᱜ ᱠᱟᱱᱟ } } } \\\\\\ ᱥᱤᱥᱴᱚᱢ ᱱᱳᱰ-᱑ ᱾

ᱤᱞᱮᱠᱴᱨᱚᱱ ᱠᱚ ᱫᱚ ᱤᱞᱮᱠᱴᱨᱚᱱ ᱫᱟᱲᱮ, ᱫᱟᱲᱮ, ᱫᱟᱲᱮ ᱟᱨ ᱫᱟᱲᱮ ᱫᱟᱲᱮ ᱠᱚ ᱛᱟᱞᱟ ᱨᱮ ᱤᱞᱮᱠᱴᱨᱚᱱ ᱠᱚ ᱵᱮᱵᱷᱟᱨ ᱠᱟᱛᱮ ᱴᱨᱟᱱᱥᱠᱨᱤᱯᱴ ᱠᱚ ᱨᱮᱭᱟᱜ ᱫᱟᱲᱮ ᱠᱚ ᱠᱚᱢ ᱫᱟᱲᱮᱭᱟᱜ-ᱟ᱾ ᱥᱟᱨᱤ ᱜᱮ, ᱱᱚᱣᱟ ᱫᱚ ᱵᱟᱱᱟᱨ ᱯᱟᱦᱴᱟ ᱨᱮ ᱵᱮᱵᱷᱟᱨᱚᱜ ᱠᱟᱱ ᱟᱨ ᱵᱷᱟᱞᱵᱷ ᱠᱚ ᱨᱮᱭᱟᱜ ᱱᱟᱹᱢᱩᱱᱟ ᱠᱚ ᱵᱮᱵᱷᱟᱨ ᱠᱟᱛᱮ ᱵᱚᱱᱫᱚᱭ ᱢᱮ ᱾ So based on this property we can either have the coil not energized when the gas circuit is closed, which is a normally closed (N/C) type valve, or we can have the coil not energized when the gas circuit is open, which is a normally open（N/O） type valve.