sentences:  In the US, there are around 9524 establishments (including automotive, aircraft, power and construction industries) who depend on engineered surfaces with support from 23,466 industries.There are around 65 academic institutions world-wide engaged in surface engineering research and education.Surface cleaning, synonymously referred to as dry cleaning, is a mechanical
  cleaning technique used to reduce superficial soil, dust, grime, insect droppings,
  accretions, or other surface deposits.