<https://www.ultrainstrument.com/product/rs-20-integrated-rail-state-inspection-vehicle/#webpage>
<http://schema.org/description>
"RS-20 Integrated Rail State Inspection Vehicle is to inspect the comprehensive data of rail flaw, ballast, rail state and tunnel."
<https://www.ultrainstrument.com/product/rs-20-integrated-rail-state-inspection-vehicle/>