Digitus impressus resistens GL ferri scheda ferro stannum est scheda chalybea obductis late in multis agris adhibita ut materias aedificandas, domum adjumenta, autocineta, ambitus, machinas, naves. Schema chalybis galvanizatum aluminii zinci mixturae in superficie schedae ferri contegitur. RFP GL Coils componitur ex aluminio 55%, zinci 43.5% et 1.5% solidati siliconis in caliditate DC°C. Tota structura ex aluminio ferreo-silicone zinci componitur, denso bracteae cristalli quaternariae admixto adoperta formans.