system for applying spray coatings composed of high end plastic which are used to strengthen and rehabilitate underground structures, namely, sewer pipes, concrete and brick structures, underground tanks, gas and water pipes, manholes, mains and network mains

'appli':3 'brick':25 'coat':5 'compos':6 'concret':23 'end':9 'gas':29 'high':8 'main':34,37 'manhol':33 'name':20 'network':36 'pipe':22,32 'plastic':10 'rehabilit':17 'sewer':21 'spray':4 'strengthen':15 'structur':19,26 'system':1 'tank':28 'underground':18,27 'use':13 'water':31

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