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Iyi mold inonyanya kushandiswa kugadzira friction rings.

Kugadzira marudzi ese ezvigadzirwa zveannular, nekuti zvigadzirwa hazvina mhango, chimiro che mold chakasiyana kubva kune zvakajairwa zvigadzirwa.

Zvimiro zvechiumbwa ichi ndezvi:

(1) Divi yepakati ine mibato nema rollers

(2) Kune matanda ekutungamira uye maoko ekutungamira, uye kusungirira mold kwakatsetseka

(3) Iyo mold inogona kudhonzwa pakuwedzera mbichana uye kubvisa chigadzirwa, icho chiri nyore kushanda.

Iwo makuru ma parameter e mold ndeaya anotevera: