關於「RTT lift」標籤，搜尋引擎有相關的訊息討論：

Lift and Escalators: Lift Traffic Analysis: MECH3005 - Scribdwww.scribd.com › document › Hk-Lift-Analysis(PDF) Calculating the Elevator Round Trip Time for the Most Basic of ...www.researchgate.net › publication › 275408163_Calculating_the_Elevato...Definitions of lifts - Slide