... longe-lived , installs simply ,easily use --1.RCYA series hanging permanent-magnetic iron removerr adopts high rectify strength inside, the special ... 0. 1-25 kilograms of iron magnetic material, the permanent magnetic system service life of inside is over 10 years ... accords with JB/T8711-1998 standard . --3.When the permanent magnet absorbs more ferromagnetic things , people should use no-magnetic ...