Microbiology of the food chain — Horizontal method for the enumeration
of microorganisms — Part 2: Colony count at 30 °C by the surface plating technique
Non-destructive testing of steel tubes — Part 10: Automated full
peripheral ultrasonic testing of seamless and welded (except submerged
arc-welded) steel tubes for the detection of longitudinal and/or
transverse imperfections — Amendment 1: Change of ultrasonic test
frequency; change of acceptance criteria