When using these, you'll be able to adapt backlash, as when the teeth use necessitates backlash adjustment, without needing a change in the center distance.
Mgbe ị na-eji ndị a, ọ ga-ekwe omume ịhazigharị azụ azụ, dị ka mgbe ezé ezé chọrọ mgbatị azụ azụ, na-achọghị mgbanwe na etiti anya.