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N.G. Orifice (Comment: 22,500 Btu; 10,000 feet (3050 m) and higher; 20,000 Btu; 6000-7499 feet (1830-2289 m))
D503781
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N.G. Orifice (Comment: 22,500 Btu; 9000-9999 feet (2740-3049 m); 20,000 Btu; 4500-5999 feet (1370-1829 m))
D503780
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N.G. Orifice (Comment: 22,500 Btu; 8000-8999 feet (2440-2739 m); 20,000 Btu; 2500-4499 feet (760-1369 m))
D503779
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Screw Orifice (Comment: 22,500 Btu; 6000-7999 feet (1830-2439 m))
58719
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N.G. Orifice (Comment: 22,500 Btu; 3000-5999 feet (915-1829 m))
D503778
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