73241038
Feb 25, 1980
Mar 23, 1982
Geotechnical Instrumentation-Namely, Vibrating Wire Stressmeters, Strain Gages, Piezometers, Earth Pressure Cells and Readout Boxes, Dataloggers, Extensometers, Convergence Meters, Sonic Probe Readout Boxes, Load Cells, and Borehole Deformation Gages
Electrical and Scientific Apparatus