Internal welding yog hais txog cov txheej txheem welding uas tshwm sim hauv cov yeeb nkab steel, qhov chaw vuam caj npab tau muab tso rau hauv cov yeeb nkab ntawm qhov nrug deb ntawm qhov chaw sib koom ntawm cov hlua hlau thaum lub sij hawm tsim cov txheej txheem. Ob leeg sab hauv thiab sab nraud welding ntiav ib leeg-xaim submerged arc tsis siv neeg vuam txoj kev nrog ncaj qha tam sim no rov qab polarity.
Dab tsi yog qhov kev ua haujlwm ntawm kev siv vuam sab hauv?
Sep 26, 2024
Xa kev nug
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