Definition of acupressure : the application of pressure (as with the thumbs or fingertips) to the same discrete points on the body stimulated in acupuncture that is used for its therapeutic effects (such as the relief of tension or pain) â compare shiatsu
The SVI is the volume, in milliliters, occupied by 1 gram of settled activated sludge, and it is a measure of the settling characteristics of the sludge.
1 The TU (for Time Unit) is a unit of time defined as 1024 Âµs for use in engineering. 2  The Svedberg is a time unit used for sedimentation rates (usually of proteins). It is defined as 10â13 seconds (100 fs).  The galactic year, based on the rotation of the galaxy, and usually measured in million years.