External welding yog hais txog cov txheej txheem welding uas tshwm sim nyob rau sab nrauv ntawm cov yeeb nkab steel, nyob ntawm qhov deb ntawm ib thiab ib nrab pitches lossis ob thiab ib nrab pitches los ntawm cov weld sab hauv.
Lub luag haujlwm ntawm kev sib txuas sab nraud yog dab tsi?
Sep 26, 2024
Xa kev nug
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