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The iron cover 渗 oil examination method:Join in the cover of iron 1/2 of black ink, heading up the iron cover bore to place 30 minutes, then observe cover whether the ink leak out.

The hard cover infiltrates the oil inspection procedure: Joins 1/2 black ink in the hard cover, upwardly lays aside the hard cover hole 30 minutes, whether then observes the cover ink to seep out.

The test procedure of oil leak of an iron lid: fill a half of the lid with black ink, place it with the lid hole upward for 30 minites, then observe if there is ink coming (leaking) out.

oil leaking iron lid test procedure : fill half the iron lid with black ink, place iron lid with hole facing upward for 30 minutes and then observe whether the black ink leaks out.