In the heat transfer device the capillary structure with thickness gradient is fabricated by centrifugalforming technology so that it is possible of non-mandrel bar technology.
制造该热传递装置主要是利用离心成型技术制作具有厚度梯度的毛细结构，使得无芯棒工艺成为可能。
2
Most of that gas flows inward and adds to the mass of the forming star, but the gas is rotating. The centrifugal force from that prevents some of the gas from reaching the forming star.
大多数气体向里流动，增加正在形成的恒星的质量，但这些气体一直在旋转。
3
The forming mechanism of pinhole defect in no-solvent polyurethane coat on centrifugal nodular cast iron pipe is analyzed, some effective measures to eliminate offered.