结论不同包埋材料对铸造收缩影响不同，无圈包埋时的铸造收缩小于有圈包埋。

Conclusion the influence of different investment materials on the cast shrinkage is different. The cast shrinkage invested without ring is smaller than that with ring.

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蜂毒肽对去内皮主动脉环由苯肾上腺素引起的收缩无作用；

In endothelium-denuded aorta rings, melittin did not have the effect on the contractile responses induced by PHE.

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研究了低烟无卤阻燃低温收缩聚烯烃材料的配方及其产品辐射加工工艺。

Composition and irradiation crosslinking products processing technology of low smoke, halogen free, flame retardant and low temperature heat shrinkable polyethylene were studied.

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