This turbidity is caused by material present in the original black tea.
这种浑浊是由存在于原料红茶中的物质所引起的。
Described the application and the present state of the research for the dulling material.
叙述了消光材料的应用和研究现状及存在的问题。
The present invention provides one kind of polyurethane material and its preparation process.
本发明提供一种聚氨酯材料及其制备方法。
The present invention discloses a method for manufacturing a superconductive material.
本发明公开了一种制作超导材料的方法。
The present invention relates to a steel-plastic composite pipe material for transmission of fluid.
本发明涉及一种输送流体的钢塑复合管路材料。
The present invention is a kind of angular photochromic material and its preparation process.
本发明公开了一种光角变色材料及其制备方法。
The present invention belongs to the processing of material or similar material.
本发明属于材料或类似材料的加工。
The present invention belongs to the field of material sieving technology.
本发明属于物料筛分技术领域。
The present invention belongs to the field of material sieving technology.
本发明属于物料筛分技术领域。
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