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.
PVC Disposal and Recycling. Household and infrastructure pipes are often made from PVC. Polyvinyl Chloride, or PVC, is the plastic commonly known as vinyl, which can be found in everyday items from bottles to house siding. PVC content is identified on plastic containers by the number 3 in the triangular recycle symbol.