Kita ngerti manawa bakal ana kabel jembatan irung ing topeng, sing digunakake kanggo ndandani topeng ing irung, nanging sawetara garis irung dudu logam, nanging uga plastik.
Yen topeng sing bisa dienggo umum ora duwekawat jembatan irung, it cannot fit the mask well on the face. The top and sides of the mask will leak out. Wearing it while keeping a distance from the crowd can also play a protective role. However, in close contact, the protective effect of a mask without a kawat jembatan irung will be greatly reduced, which greatly increases the risk of infection. As a medical surgical mask, if there is no kawat jembatan irung, it is unqualified.