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E-iav sib sau rov qab rau ntov
1.Cov nrog cov silane tshwj xeeb-raws li sizing, tau tshaj thiab ve, xa cov loj dua respathabability thiab zoo heev censability,
2.Final composite cov khoom xa cov dej tsis kam thiab tshuaj lom neeg ua tau zoo heev.
3.typically siv los tsim frp kav dej.
