| http://www.w3.org/ns/prov#value | - sensing element including magnetically permeable elements for defining a predetermined flux collection aperture; FIG. 17 is a diagrammatic illustration showing another way of positioning the apparatus of the present invention in the path of a passing vehicle; FIG. 18 is a graphical illustration, similar to FIG. 10, of the response curve of a magnetic field sensing device showing how field intensi
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