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5.The rod coatings are made up of cellulose, mineral silicates, oxides, fluorides, basic carbonates and powdered metal alloys.

6.The particular constituents used are held together with a binding material such as sodium silicate.

7.The coating covers the length of the core wire, except where it fits into the holder.

8.The two basic types are the rutilecoated electrode and the hydrogen-controlled electrode.