Kev sib sau: Los ntawm ntau qhov kev sib tw ntawm cov menyuam nias thiab sib sau ua tiav, cov hlua hlau yog maj mam deformed rau hauv cov raj uas xav tau (xws li cov raj puag ncig, cov raj square, thiab lwm yam).
High-Frequency Vuam: High-frequency induction cua sov tshuab yog ua hauj lwm los weld lub tsim raj blanks. High-frequency tam sim no dhau los ntawm cov npoo ntawm lub raj blanks, sai cua sov lawv mus rau lub xeev molten, thiab vuam yog tiav nyob rau hauv qhov kev txiav txim ntawm nyem rollers.
