A.A對應(yīng)A1和A2B.B對應(yīng)B和CC.B1對應(yīng)D和ED.B2對應(yīng)E和FE.B3對應(yīng)F
A.不燃材料 B.難燃材料 C.可燃材料 D.易燃材料 E.閃燃材料
A.A1對應(yīng)A和B B.B對應(yīng)B和C C.B1對應(yīng)D和E D.B3對應(yīng)F