Receptor: 1. In cell biology, a structure on the surface of a cell (or inside a cell) that selectively receives and binds a specific substance. There are many receptors.
The most common is EPNS (Electro Plated Nickel Silver) but many other symbols are used: 1  EPBM (Electro Plated Britannia Metal). 2  EPCA (Electro Plated Copper Alloy). 3  ESM (Electro Plated Silver Mounts).he most common is EPNS (Electro Plated Nickel Silver) but many other symbols are used: 1  EPBM (Electro Plated Britannia Metal). 2  EPCA (Electro Plated Copper Alloy). 3  ESM (Electro Plated Silver Mounts).
ips simply means iron pipe size piping is a general term used to describe any hollow cylindrical carrier of liquids many piping materials are used to produce both pipe and tubing piping and tubing made of the same materials generally use different kinds of fittings all piping made to the od outside diameter of wrought iron pipe is referred to as being iron pipe size or ips the od of most pipes is the controlling dimension in order to match with fittings