A polymeric coating for a glass substrate includes a hexafluoropropylene oxide derived silane polymer. The host lattice is embodied in the form of a carbidonitridosilicate-based compound. A user is allowed to choose either the push-and-pull mandrel-driving device or the rotational mandrel-driving device according to different working spaces or personal practices. The dielectric layer has a thermal product less than 1495 Jm\u22122 K\u22121s\u221212, the thermal product being 12, where \u03c1 is the density of the layer, C is specific heat of the layer and k is thermal conductivity of the layer. The racecourse is then sectioned along its length so as to produce a series of zones, wherein the variations shown in the soil conductivity map are utilized in choosing the sizes of the zones, the going condition in each zone is determined and a map of the racecourse displaying the going conditions along the racecourse is produced. In one particular aspect, the frequency plan provides a two-thirds relationship between the frequencies of the multiple signals.