| Hom | Hom | Siv tau |
| OTIS | YZ-TS 177-201/QM177GY1/XAA177HP1 | Otis escalator |
TS177-201 thiab QM177GY1 yog cov khoom siv sib xws, thov saib cov qauv kom paub meej ntxiv. QM177GY1 yog tus qauv pem hauv ntej, XAA177HP1 thiab XAA177HP2 yog cov lej ntawm sab, uas yog cov khoom zoo ib yam.