hush kit

listen to the pronunciation of hush kit
الإنجليزية - الإنجليزية
a series of modifications made to an aircraft's engine to dampen noise

Even though they were fitted with hush kits, the overnight freighters were the subject of repeated noise complaints. News.com.au Feb 2007.

hush kits
plural form of hush kit
hush kit
المفضلات