arandela de presión de dientes internos
/ˌaɾandˈela ðe pɾesjˈon de ˈðjɛntes intˈeɾnos/
n
English: internal tooth lock washer · 内齿锁紧垫圈
Significado：Washer having protuberances on the inside so that a screw tightens securely and will not loosen.