T cells and B cells differ in the form of the antigen they recognize, and this affects which antigens they can detect. B cells bind to antigen on invaders that are found in circulation outside the cells of the body, while T cells detect only invaders that have somehow entered the cells of the body.
ABS, DWV, Solid or Cell Core sewer pipe. The solid pipe is composed of ABS at 99% while the cell core is composed of a cellular foam between 2 layers of ABS which makes the cell core pipe lighter.
RTR Pipe(Reinforced Thermosetting Resin pipe) is a kind of  composite thermosetting plastic pipe,combing Resin with Fiberglass  Roving.  In fact,the RTR pipe have a m â¦ ore approperiate name as GRE(Glass  Reinforced Epoxy) Pipe, since that uses Epoxy Resin instead of  Polyester.    GRE Pipe have much superior properties than common RTR Pipe,  especially in properties of high pressure resistant.