tornillo de un solo sentido
/ˌenθendˈiðo ˈβara ˌapaɣˈaðo ˈβara βolˈumen/
n
English: one-way head · 单向槽头
Significado：Slotted head having two opposing quarters removed so that the screw can be turned one way only, making it very difficult to unscrew.