Qhov no hydraulic kub xovxwm tshuab JC-7E tsis tuaj yeem tsuas yog kub xovxwm ntaub, tab sis kuj iav iav txhuas.
Nws yog qhov zoo rau kev thov hloov mus rau txhua yam ntaub ntawv, uas nyiam txhuas kos duab vaj huam sib luag, iav, cov vuas luaj ceramic, tsoos tsho thiab lwm yam.
