51吃瓜

??? ?? ??????? ??????????? ??? ?????????? ??? smartphones, ??????? ???????? ??? ?????????? ??? ??????????? ????nolog?? ??? CNC, ?????????, ????????, ????-????????, ??? ????? ???? ????? ??????? ??? ??? ??? ????. ?????? ??? ?? ??????????? ?????????????? ?? ?????????? ????????????????? ????? ?????????? ????? ??? ??????? ?????.

1. Casting

Metal casting is the process of injecting molten metal into a hollow mold made of high-temperature resistant materials, condensing it to obtain the desired shape of the product, and the resulting product is the casting.

Metal casting can be divided into gravity casting and pressure casting based on whether it is affected by pressure. ?????????????? ??????? ?????? ??? ???????? ??? ??????????? ????? ???? ??? ?? ????? ?????? ??? ?????? ??? ??? ? ?????????????, ???? ?????? ??? ???????. ??? ??????????? ????? ????? ????? ??????? ??? ??? ???, ???? ?????? ???? ??? ????? ????? ??? ??? ??????????? ????? ?? ????????? ??? ??????????? ?????, ????????, ?????, ??? ?????? ??? ??????? ?? ???????? ??? ?????????. ???????????????? ???? ??? ??? ???? ??? ????????? ?? ?????? ??? ?? ???? ???????? ????? ??? liquid ????? ????? liquid ?????? ???? ?? ???? ??????? ?????? ??? ???????, ??? ???????? ??? ???????? ?????? ??????? ?? ???????? ????????. ??? ????????? ?????? ???? ????? ????????? ??? ????-??????? ????????, ?????? ??? ????? ???????? ???????.

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??????? ?????? ?? ? ??????????????? ???? ???? ??????? ?? ?????? ??? ???? ??? ??????? ??? ???????????, ?? ???????? ????????? ??? ?????? ?????????? ???????????, ?????? ??? ????.

??????? ??????????? ????? ????? ??????? ??? ???? ????? ?????? ???? ?? ??????? ????? ???? ???? ????? ???????: ?????? ???????????, ?????? ?????? ???????????, ??????? ?????????, ??? ??????? ???????????, ??? ?????? ?????? ??????? ???? ?? ????????? ??? ????????? ?? ?????????? ???????????? ??? ?????????? ?? ?????? ?? ????? ??????? ??? ?? ???????? ?????; ????? ???? ??? ????? ?????? ???? ???? ?????; ??????? ????? ?????? ???? ???? ?? ?????? ???????. The difference between drop hammer forging and flat forging lies in the fact that the hammer in drop hammer forging has a die cavity, in which the working piece bears two types of pressure or impact forces, and then undergoes plastic deformation according to the shape of the die cavity. ??????? ???????????? ??? ?? ?????????? ????? ??? ???? ????? ??????? ?? ????? ??????? ??? ????????? ??? ??? ?????. ????? ?? ????? ????? ??? ??? ??????? ??????????? ?? ????????????, ??? ??????? ???? ??? ??? ????? ???? ??? ?????????? ??? ??? ???????????, ????? ???? ???? ??? ???????? ???? ??? ??? ?????????, ??? ?? ???????????? ???? ??? ???

OPPO r7

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????????? ?????? ??? ??????? ????? ????????? ??? ????????? ?????? ??? ?? ????? ???? ???? ??? ????? ???? ????????? ????????. ?? ??? ?? ????????? ????? ???????? ??????????????????, ???? ?????? ??? ????? ??ам????? ??? ????????????? ??? ????? ???????? ??????? ??? ????? ??????: ??????, ??????? ??? ???????????? ???? ??? ?????? ???????, ?????? ??? ??????? ??????? ???? ???????????? ?? ????????? ??? ???????????? ?????? ????? ??? ??? ??????, ??? ?????? ?? ??????? ?????. ?? ??????? ????? Xiaomi's Redmi Note 3 is a metal back cover made using stamping technology.

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card symbol CNC ????????

CNC， ??? ?????? ?????? ??? ??????????? ????????? ?????????, ???? ???? ??? ??? ???????????????? ????? ????????????? ???? ?? ??????????, ?????? ?? ?? "CNC ?????? ???? ????????? ?????? ??? ????? ?? ??????????? ???????????????????? ??? ????????? ??????? ????? ?????? ?????????? ??????????????. ???? ?????????????????????, ??? ??? ???????????? ????????? ????????? ?????????? ????????? ??? ??? iPhone 5, Apple ??? ????????? ??????????? ?????? ??????? ?????????, ??? ??? ??? ??? ???? ?????? ??? ?? ???? ???? ??? ??????????? ??????? CNC ??????.

iPhone 6

?????? ??????????????????? ???? ??? ???? ????? ??? ?????????? ??????? ???? ????????? ??? ????? ??????????????? ?? ??????? ???? ???????? ???? ?????? ???, ?????????????, ??????????, ??зайн???????????? ??? ???????????????? ?????? ?????????????????, ??? ?? ??????????????? ? ??? ?????? ??? ????? ???дар?????????? ???? ?? ????????, ??? ?????? ??? ??? ????? ????? ???????? From a single dimension analysis, each dimension is divided into 10 levels, and the higher the score, the better a certain process is in that dimension.

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