1. Cov txheej txheem polishing zoo ntawm cov hniav kom puncture tau yooj yim thiab du.
2. Siliconised koob txo qhov mob thiab ntshav coagulation.
3. Rov qab qhov muag thiab ultra nyias-walled kom ntseeg tau tias cov ntshav txaus.
4. Rotatable tis thiab tsau tis muaj.