| Cov ntsiab lus | 180 ° Protractor |
| Muag Cov Ntsiab Lus | Zoo zoo thiab tus neeg muag khoom, tus nqi sib tw |
| Nta | Multi-functional, yooj yim thiab meticulous tsim |
| Kev siv | Kos cov kab ncaj nraim thiab lub voj voog, ntsuas qhov ntev thiab lub kaum sab xis |
| Tsis muaj | 10 cm, 180° |
| Daim ntawv pov thawj |
