51吃瓜

?? ??? ??? ??????? ???? ???? ???? ??????????????? ????????? ?????? ?????? ???? ??????????? ????????? ??????????? ?? ???: ??? ?????? ???????? ??? ??? ????? ???? ?????? ???? ??????????? ??? ????? ????? ????????? ????? ?????? ???? ???????????, ??? ???????????? Sheet metal chassis, cabinets, equipment casings, etc. are exposed to the air and will not oxidize under the protection of the paint layer, so they will not rust and have water proof properties. Sheet Metal Processing generally selects suitable materials based on the characteristics of the products that need to be processed. Sheet metal processed products are mostly qualitative, so materials and products are also easily corresponded. Sheet metal generally uses many materials, and it is precisely because sheet metal has diverse metal materials and processing procedures that there is no accurate definition for sheet metal.

??? ??????????? ???????? ???? ?????????? ??? ??????: ????, ?????????? ?? ????? ???? ????????, ??? ??????? ???????? ?? ????? ???? ????????????? ??????, ??? ?????? ?????????? ?? ?????? ????? ?? ??????????? ???? ???? ??????

1. ???????? ????????. ?? ?????????????? ???? ?????? ?????? ???????????????????? ???? ?? ???????? ??? ????? ?????????, ?? ???? ????????????, ?????????????, ??????

2. Primer. ??? ????????????? ???? ???????? ???? ??? ???? ??? ??????????????? ??????????? ??? ??????? ?????? ?? ??????????? ????????? ??? ???? ??????????? ??? ??????????? ?'??? ????? ?? ?????????? ??? ???? ???? ????????? ??? ?????? ????????????. ?? ?????? ????????????? ?????: ???????? ?????, ???????? ???????? ??????, ????? ??????, ????? ????? ?????????, ??????????, ??? ????????????.

3. ???????????????? ??????. ?? ???????????????? ??????????? ??????????? ???? ???????????????????? ???? ????????????? ?????, ????? ??? ???? ??? ?????????? ??? ??????????????? ???? ????????? ??? ?? ??????????????? ?????-?????????? ???????? ??????????????????????????. ????? функция ??? ?? ????????? ?? ???? ?? ????????? ??? ????? ??? ?????, ??? ??? ????????? ??? ????-???????, ??? ??? ??? ???????????????? ??? ?? ?????? ??? ?????? ?????????. ????? ????????????? ?????: ???????? ????? ??? ????? ??????, ?????? ???? ?????? ??? ????? ????? ?????????, ??.

????? ?????? ?? ????? ??? ????? ???? ?pr????????? ???? ??? ???? ????? ??? ??????????? ??????, ???? ???????? ????????halt ?????????, ???????? ??????? ?????????, ???????? ??? ?????????????? ???????

??? ???????? ???? ??????????? ??? ??????? ???? ?????????. ??? ?? ????? ???? ?????, ????????? ??? ?? ??????? ??!