Although there are a lot of the fabricating techniques of functionally gradient material (FGM), the centrifugal casting method is more effective, cheaper and easier to operate.
虽然梯度功能材料的制备方法很多，但效率较高、成本较低、操作较简单的方法是离心铸造法。
2
Using the strong background magnetic field produced by effective electromagnet and the catching surface to produce high magnetic field gradient makes the separation of micro-grade material possible.
利用有效电磁体产生的强背景磁场和能产生高磁场梯度的捕集表面，使得分选微米级的物料成为可能。
3
The experiments show that microbe solution flooding can decrease the threshold pressure gradient, lessen the flow resistance, and extend the effective drainage distance.