--subdivision Calibration under types of scientific and technical instruments and equipment, e.g. Rolls (Rolling-mills)--Calibration; Strain gages--Calibration
Here are entered works on the procedures used in establishing and maintaining acceptable limits of variation for products and services. --subdivision Quality control under types of industries, plants, and processes, and under individual materials and types of materials, e.g. Construction industry--Quality control; Foundries--Quality control; Concrete--Quality control