A. silos B. railroads C. mass transit system D. harbours and ports E. tunnels F. buildings
A. the owner B. general contractor C. subcontractors D. surveyors E. architects F. supervisors G. project managers
A. brick B. stone C. opaque glass D. precast concrete E. aluminum
A. glass B. plastics C. wood D. aluminum alloy E. plastic steel
A. silt B. clay C. sand D. gravel E. rock
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