1.rofessional valve chaw tsim tshuaj paus, nrog ntau tshaj 20 xyoo ntawm kev lag luam kev paub.
2.Lub hli muaj peev xwm ntawm 1million teev, pab kom xa khoom sai
3.Kuaj txhua lub valve ib los ntawm ib qho
4.Intensive QC thiab xa khoom raws sij hawm, ua kom zoo txhim khu kev qha thiab ruaj khov
5.Kev sib txuas lus sai, los ntawm kev muag khoom ua ntej mus rau tom qab muag