comply with applicable codes and regulations. table shows physical properties of gaseous hydrogen. as indicated by the specific gravity, hydrogen gas is much less dense than air and can disperse rapidly or accumulate in the upper sections of enclosed spaces. gaseous hydrogen flammability the wide flammability...
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". [ ] materials[ edit ] yarn can be made from a number of natural or synthetic fibers . many types of yarn are made differently though. there are two main types of yarn: spun and filament. fibers[ edit ] cotton being slubbed the most common plant fiber is cotton , which is typically [ ] spun into fine...
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