Commodities of Martian Rails: Nanotech Bots

Martian Rails (2009), the crayon board game manufactured by Mayfair Games about railroading on the Red Planet in which players build tracks and haul freight in sleek trains with names like Spirit, Tweel and Viking, has a long list of cool commodities that players can transport to generate revenue for their rail companies. For example:

Nanotech Bots -- Microscopic, engineered robots designed for a multitude of repair or construction purposes. They are capable of working at the cellular level in biological subjects.

Martian Rails is loaded with references to Martian SF!