级进 meaning in English

grading-up
upgrading

Let us look to the great principle of gradation, and see whether nature does not reveal to us her method of work .
让我们看着伟大的级进原理，来窥测自然界是否给我们揭露它的工作方法。
Design of the multi - position progressive die for the motor shell
马达外壳多工位级进模具设计
Application of analytic hierarchy process in strip layout system
层次分析法在级进模工步排样系统中的应用
The count of punching surface ' s dimensions on the multi - step progressive die
多工位级进模冲裁型面尺寸计算
Top - down parameterized assembling design of multi - position progressive die
多工位级进模自顶向下参数化装配设计

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