Tus nqi ntawm cov hlau npua tau nce siab dua, thiab lub sijhawm xa khoom siab tshaj plaws ntawm kev lag luam hlau cam khwb cia tau tuaj txog ntxov.
Nyob rau xyoo tas los no, qhov kev thov rau cov hlau npua tau nce ntxiv. Vim yog cov nyiaj tau los ntau ntawm cov khoom hlau. Tuam Tshoj yog lub teb chaws tsim khoom loj. Qhov kev nce sai ntawm qhov kev thov rau cov hlau npua rau cov hlau cam khwb cia hauv kev lag luam foundry tau ua rau muaj qhov tsis txaus ntawm cov hlau cam khwb cia thiab cov hlau ductile thiab cov nqi nce siab. Cov peev txheej hlau thoob ntiaj teb tsis tshua muaj, thiab cov chaw ua hlau khib nyiab hlau muaj kev thov ntau thiab kev muab khoom tsis txaus. Qhov kev nce nqi ntawm cov khoom siv raw thiab kev nce nqi ntawm kev thauj khoom tau ua rau muaj kev nce nqi ntawm cov khoom seem xa tuaj, uas thaum kawg ua rau kev xa khoom sai ntawm kev lag luam hlau cam khwb cia.
Lub sijhawm tshaj tawm: Plaub Hlis-07-2021
