Yuav ua li cas txuas tsib hlau ntawm of elevator hloov?
Tsib txoj kev sib txuas ntawm of elevator hloov:
1, ib qho yog tus ncej zoo ntawm lub teeb me me, ob qho yog qhov zoo thiab qhov tsis zoo ntawm cov khoom siv hluav taws xob, ob qho tib si yog lub iav nqa fais fab kab, txuas nrog nce, thim rov qab;
2, tam sim no ntau lub tsheb qhov rooj thiab qhov rais iav lifting (kaw thiab qhib) tau muab lub viav vias hom phau ntawv nqa hom, feem ntau yog siv lub laub khawm hluav taws xob nqa;
3, yog siv hluav taws xob iav lifting los tswj, uas feem ntau hu ua "electric tsheb qhov rooj thiab qhov rais".
