| Autor: |
Vale, D. W., Elvery, R. H. |
| Zdroj: |
Magazine of Concrete Research; November 1955, Vol. 7 Issue: 21 p161-164, 4p |
| Abstrakt: |
Summary The new apparatus described is basically similar to the Road Research Laboratory ultrasonic equipment but has been designed to be more convenient for field testing work. It has been built in two separate units for easy portability and the weight has been reduced to approximately half that of the original apparatus. It is still necessary to provide an a.c. mains supply for the equipment. A number of new features have been incorporated, providing greater convenience in use and servicing. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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