rondelle à denture intérieure
/aʁtˈɛʁ iljˈak/
n
English: internal tooth lock washer · 内齿锁紧垫圈
Sens：Washer having protuberances on the inside so that a screw tightens securely and will not loosen.
English: internal tooth lock washer · 内齿锁紧垫圈