Precision and accuracy are completely different concepts. Let's explore what they really mean, and how to tell the difference. 1  Resolution is the fineness to which an instrument can be read.  Precision is the fineness to which an instrument can be read repeatably and reliably.
1980s & 90s-High Performance Plastics. 1980 - First production of linear low density polyethylene. 1980 - First Blue HDPE pressure pipes for potable water introduced into UK. 1982 - First artificial heart made mainly of polyurethane, introduced implanted in a human.
There have been many innovations in the shapes of tea bags over the years. The earliest tea bags were sack-like in shape. Later, tea bags became flat and rectangular. In the 1950s, Lipton invented the multi-dimensional Flo-Thru tea bag, which gave leaves more room to open.