Function effectiveness: After then special - purpose, exempts the flushing formula.功能效用: 便后專用, 免沖洗配方.Its three - wheel design exempts it from onerous federal testing regulations.它的三輪設(shè)計(jì)使它不用再受繁雜的聯(lián)邦機(jī)動(dòng)車測試規(guī)定的約束.Exempts the co...