permanent mold casting

基本解释

The results show that the copper alloy density by permanent-mold casting attains 99.91% of theory density.
结果表明：经金属型铸造的铜合金密度达到理论密度的99 91%。
The performance, role, potential value and application ways of heat pipe in light alloy in permanent mold casting were expounded.
初步评估了热管在轻合金永久型铸造中的行为、作用、利用潜力和应用的基本形式。
According to the basic test and calculation for copper alloy by permanent-mold casting, foundry technique parameters of the rotor counterbalance component of helicopter were stated.
采用金属型铸造并对铜合金材料进行基础试验和计算，确定了直升机旋翼配重构件的铸造工艺边界参数；
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