{"aspect_id":"AS41","aspect_name":"volumetric-mass-density","aspect_reference":null,"aspect_symbol":"\\rho","name":"volumetric-mass-density pound per cubic foot","scale_id":"SC837","scale_name":null,"scale_symbol":null,"scale_type":"ratio","symbol":"\\rho lb.ft-3","unit_id":"UN176","unit_name":"pound per cubic foot","unit_reference":null,"unit_symbol":"lb.ft-3"}