A vehicle suspension friction control apparatus includes a first link having a first end and a second end, and a second link having a first end and a second end. The acid solution is aqueous sulfuric acid and ammonium sulfate is produced. 5; having a defective pyrochlore structure are useful for active and passive electronic applications, as dielectrics, catalyst sensors, hosts for radioactive waste, etc. , to secure to a material relative to the body portion. Wherein a portion of the belt displacement device is located on a downstream side of the belt guide member in a traveling direction of the belt, and the portion continuously contacts the side edge part of the belt. In additional embodiments, the present invention provides for ELISA assays which detect PIF by determining the effect of a test sample on the binding of anti-CD2 antibody to a CD2 substrate.