A.不得低于標(biāo)準(zhǔn)值 B.允許+50%~-10% C.允許+10%~-10% D.允許+10%~-5%
A.IP56B.IP66C.IP67D.IP68
A.IP44 B.IP65 C.IP67 D.具有雙層或加強絕緣的Ⅱ類