Rub lub monorail crane nrog koj txhais tes, rub lub zipper sawb thiab tsav ncej kom tig, thiab siv lub zog tsav cov chais kom taug kev ntawm txoj kev.
Yuav kom ua tau raws li qhov sib txawv ntawm qhov dav qhov yuav tsum tau ua, kho cov tshuab ntxhua khaub ncaws siv thiab ntsia rau sab hauv lossis sab nraud ntawm phab ntsa vaj huam sib luag rau kev hloov kho.