1. It points out that the birth of Gutta-Percha rubber with high elasticity is a sign that the research-development of Gutta-Percha has entered into a new stage.
指出,杜仲胶高弹性体的出现,是其研究开发进入新阶段的标志。
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2. It points out that the birth of Gutta-Percha rubber with high elasticity is a sign that the research-development of Gutta-Percha has entered into a new stage.