Lifting Nplhaib Bolt txuas rau forging, thiab tom qab kev kho mob tas li thiab tshem daim tawv nqaij oxide; Kev zam txim yam tsis muaj dhau - hlawv, tawg tsis xws luag; Lub nplhaib nqa screws yog uniformly hardness kuaj
Lifting Nplhaib Bolt txuas rau forging, thiab tom qab kev kho mob tas li thiab tshem daim tawv nqaij oxide; Kev zam txim yam tsis muaj dhau - hlawv, tawg tsis xws luag; Lub nplhaib nqa screws yog uniformly hardness kuaj