51吃瓜

???????? ????? ????? Tungsten? ????? ????? ???? ?????? ??? ?? ????? ? ????? ?????? ????? DC538503, LG, 8566, SKH-9, PM23, PM4 ? ???? ????? ????? ?? ????? ??????. ??? ????? ???? ???? ??????? ?????? County, Ningjiang District ? ?????? ?? ????? ? ????? ?? ?????? ???. ?? ?? ??? ???????? ?????? ??????? ?? ???????? ???? 716 steel mold, steel mold SK3, 420 steel mold, steel mold, GR mold steel etc. ?? ???????? ?????? ? ????????? steel mold ??????? ???????? ???? ???????? raw, materials preparation, materials precision, roughening, drilling deep hole, treatment of vacuum heat, six sided right angle, etc. ?? ???? ??-stop? ???? ????? customized according to the drawing, and higher total alloy quantity ?????? ????? ???