Temperature Measurement Standards. ASTM's temperature measurement standards provide the material and property specifications, as well as guides for the testing, calibration, and use of laboratory, industrial, and clinical instruments used in the determination of thermal variables, particularly temperature.
A bulging disc occurs more often as we age or as repetitive activities weaken the the disc. Herniated discs are more often specifically related to trauma/injury sustained and are more acute (sudden) in onset.
Posterolateral Herniated Disc. A posterolateral herniated disc is a very common type of intervertebral prolapse condition in which the herniated section of the disc is concentrated on one side or the other of the disc center.