| 摘要 |
The welding method by thermal pencil is carried out with the help of an electrode made of steel wire and covered with fine chalk fixed by silicate glue, in this case, thermal pencil is made of steel wire too and covered with aluminum and iron shavings fixed by silicate glue, and at the end of the pencil a priming of Bertholet's salt is made and fixed by silicate glue.
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