靠近地表是冷却硬化的岩石。
这类材料由具有加热软化、冷却硬化甚至可重复循环能力的聚合物组成。
This class of materials consists of polymers which always remain capable of being softened by heat and of hardening on cooling, even after repeated cycling.
热塑料性塑料是指在特定温度范围内能反复加热软化和冷却硬化的塑料，如聚乙烯、聚四氟乙烯等。
Thermal plastic and plastic is defined as a specific temperature range can be repeated heating and cooling to soften hardened plastic such as polyethylene, PTFE and so on.
应用推荐