{"aspect_id":"AS41","aspect_name":"volumetric-mass-density","aspect_reference":null,"aspect_symbol":"\\rho","name":"volumetric-mass-density slug per cubic foot","scale_id":"SC1134","scale_name":null,"scale_symbol":null,"scale_type":"ratio","symbol":"\\rho slug.ft-3","unit_id":"UN1175","unit_name":"slug per cubic foot","unit_reference":null,"unit_symbol":"slug.ft-3"}