21. Poop-Freeze is nonflammable , contains no CFC's and is safe when used as directed. 22. The NT LZ NO7 is inflated with nonflammable helium instead of hydrogen, which caused the Hindenburg disaster. 23. Early models were often filled with highly flammable substances, though the fluid in later versions is nonflammable . 24. From that moment on, things went downhill for hydrogen airships, with designers quickly switching to nonflammable helium. 25. Once, CFCs were thought of as miracle substances _ cheap to produce, nonflammable and non-toxic. 26. :Well, it's completely nonflammable in the absence of oxygen, so why not use that? 27. The new model is filled with nonflammable helium instead of the dangerous hydrogen that doomed the first generation of airships. 28. Candles should always be held firmly in a nonflammable holder and should be lit only when people are in the room. 29. :: Also, in the presence of pure oxygen, many normally nonflammable things become flammable, like human flesh. 30. The other will recommend the installation of a nonflammable barrier between the cargo control unit and the Mylar-covered insulation blanket.
