🌐EnglishEnglishBahasa IndonesiaDeutschEspañolNederlandsPolskiРусскийالعربية日本語EntityQ2949763· pop 12chevronsaw-tooth pattern on the trailing edge of a jet engine nozzle used for noise reductionAvailable in 11 languagesEspañolDeutsch日本語РусскийالعربيةBahasa IndonesiaBelarusianNederlandsPolskiSerbianConnectionsturbofanEntity