Sab saum toj broom chaw tsim tshuaj paus rau txhuam ua machinery, hnyav luag hauj lwm plua plav-dawb broom. Kev ua lag luam rau ib puag ncig tus phooj ywg brooms thiab cov cuab yeej ntxuav tau ib txwm muaj nqis. Tshem tau plua plav-dawb pem teb tu broom zoo yas. Yam tsawg kawg nkaus kom muaj nuj nqis: 1 daim; Khoom siv: yas