It seemed that the application techniques of concrete block in China caught up with the world in the thirties of the twentieth century. At that time, 25 two-storied villas in concession of Shanghai were built of decorated concrete blocks with mushroom-liked surface, which were imported from the United States. Actually, that was not the case. Concrete blocks were not spread throughout the country in the succeeding forty years. This kind of products were mainly used for fencing walls, although one Besser block machine was imported by International Refugee Relief Organization at the end of the forties of the twentieth century, which was employed until the seventies.
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