Machine Room Neeg nrog caij of elevator
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Neeg nrog caij Traction of Elevator Ntawm Tshuab Chav
Tianhongyi of elevator txais cov hlau nplaum ruaj khov synchronous gearless traction tshuab, siab heev zaus hloov lub qhov rooj tshuab, kev tswj kev siv tshuab, lub teeb ntaub thaiv qhov rooj, lub tsheb tsis siv neeg teeb pom kev zoo, rhiab induction thiab ntau zog txuag;