Pre-fabricated metal shelter structure assembly kits, sold as a unit, comprised primarily of metal shelter structures having a breathable atmosphere, and also containing a supply of food and water, for use in emergency situations in mines and other hostile environments

'also':24 'assembl':7 'atmospher':22 'breathabl':21 'compris':13 'contain':25 'emerg':35 'environ':42 'fabric':3 'food':29 'hostil':41 'kit':8 'metal':4,16 'mine':38 'pre':2 'pre-fabr':1 'primarili':14 'shelter':5,17 'situat':36 'sold':9 'structur':6,18 'suppli':27 'unit':12 'use':33 'water':31

LIFESHELTER

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