Historical
ISO 6621-1:1986
Internal combustion engines - Piston rings - Part 1 : Vocabulary
This part defines the most commonly used terms for piston rings. These terms designate either types of piston rings or certain characteristics and phenomena of piston rings. An annex contains a list of equivalent terms in English, French, Russian, German, Spanish, Portuguese and Italian. Some figures illustrate shapes and reference quantities of concern.
International Organization for Standardization [iso]