The advantages of the production for the aluminium alloy casing with backward extruding technology replacing multi-pass ironing technology are marrated.
叙述了用反挤压工艺代替多道变薄拉伸工艺生产铝合金外壳的优点。
2
Have a journey pass by American near a Mexican border town, in the remote even is still backward town, I said, this is there any interesting place, still be inferior to a corner of Shanghai town.