Muab cov yeeb nkab muab kauv tawm, Nws cov txheej txheem ntau lawm feem ntau cuam tshuam nrog sawb lossis chev phaj mus rau kev kho mob saum npoo av, thiab siv nws mus rau txheej txheem arc clows nrog. Thaum lub sij hawm coiling txheej txheem, cov kab txaij nws tus kheej yog siv rau pre-} 2} bending thiab shaping, thiab thaum kawg welded mus rau hauv cov yeeb nkab puag ncig.
23. Dab tsi yog cov kauv welded welded? Puas muaj lwm lub npe?
Aug 13, 2025
Xa kev nug
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