top gating meaning in English

顶浇法
顶注式浇注系统

On most automotive battery grids, cooling is required in the top gate area and in the center of the mold only .
绝大部分汽车蓄电池板栅尺需要在顶部浇口部分和模具的中心冷却就可以。
In order to producte qualified inlet manifold casting , top gating system with lip riser and shell core made of precoated sand is used
为了获得合格的进气歧管铸件，采用压边顶铸浇注系统和覆膜砂壳芯制作工艺。