| 摘要 |
PROBLEM TO BE SOLVED: To provide an electrode device with the decreased number of component parts for electric corrosion protection with the function hardly deteriorated even when used for a long period. SOLUTION: An electrode rod 3 having a male screw 7 and a electric- insulating holder 5 having a female thread 13 are included. The electrode rod 3 is screw-joined to the holder 5.
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