The increasing use of Ti for multiple-unit fixed prosthesis require a method to join two and more unites in a restorative prosthesis to reduce the contraction and distortion in casting process.
随着钛在多单位固定桥中应用的增多，需要一种方法将一个修复体中的两个或多个单位连接起来，以减少铸造过程中产生的收缩和变形。
The self-compensated contraction caused by graphite dilatation in the solidification process of nodular cast iron makes casting with less flow-off or casting without flow-off possible.
利用球墨铸铁凝固过程中的石墨化膨胀，进行自身补缩，可以实现少胃口或无冒口铸造。
The casting fluidity, ratio of line contraction, casting stress and heat crack tendency were tested.
分析测定了中铬抗磨铸钢的流动性、缩孔率和铸造应力。
The casting fluidity, ratio of line contraction, casting stress and heat crack tendency were tested.
分析测定了中铬抗磨铸钢的流动性、缩孔率和铸造应力。
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