Connections for general use and fluid power — Ports and stud ends with
ISO 261 threads with elastomeric or metal-to-metal sealing — Part 2:
Stud ends with elastomeric sealing (type E)
Water quality — Evaluation in an aqueous medium of the
"ultimate" aerobic biodegradability of organic compounds —
Method by analysis of released carbon dioxide
Acoustics — Determination of sound power levels and sound energy levels
of noise sources using sound pressure — Engineering methods for small
movable sources in reverberant fields — Part 1: Comparison method for a
hard-walled test room