This model is made of soft PVC, with tube.
本模型整体结构采用PV c软搪塑制成。
Which in soft PVC film calendering the fabric sheet on the process engineering, can not be achieved.
而这在软性薄片PV C膜压延到基布上的工艺工程中，是无法实现的。
The effects of zinc stannate on flame retardancy and smoke suppression of soft PVC were studied by means of LOI, TGA and smoke density measurement.
采用氧指数法、热重分析及烟密度测试法就锡酸锌对软质pvc的阻燃抑烟行为进行了研究。
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