The American black bear lived during the same period as short-faced bears (Arctodus simus and A. pristinus) and the Florida spectacled bear (Tremarctos floridanus). These Tremarctine bears evolved from bears that had emigrated from Asia to North America 7â8 ma.
A plenum space is a part of a building that can facilitate air circulation for heating and air conditioning systems, by providing pathways for either heated/conditioned or return airflows, usually at greater than atmospheric pressure.
What is a wheel spacer? A wheel spacer is a metal ring that can be installed between the hub mount plate of a vehicleâs wheel (rim) and the hub flange (from where the wheel studs protrude). These two spacers can be used in the same application but ultimately can yield far different results due to their design.hat is a wheel spacer? A wheel spacer is a metal ring that can be installed between the hub mount plate of a vehicleâs wheel (rim) and the hub flange (from where the wheel studs protrude). These two spacers can be used in the same application but ultimately can yield far different results due to their design.