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Test cylinders of concrete, cured as nearly as practicable in the same manner as the concrete in the structure, to

Concrete delivered to, or mixed, placed, and cured on the job site.

1. At a field site, a survey of existing conditions; also called a field observation 2. At an existing structure,

In feudal England, the tenure of land or an estate subject to the feudal obligation of service and homage to

In surveying, an index line or point, used as a basis of reference.