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.
ArmaflexÂ® Pipe Insulation and Sheet. ArmaflexÂ® pipe insulation and sheet is a closed cell elastometric nitrile rubber foam designed to provide a highly efficient method of insulating pipework, ducting and vessels. It is CFC free and ideal for both hot and cold water services. ArmaflexÂ® is available in sheet and tube form as well as self adhesive backed.