Protective material, lining, edge cover and packing tape.
防护材料，衬里，包边及包装带。
The calculation method about the minimum lining thickness of concrete protective layer is given in the cold region.
提出了寒区混凝土防护层渠道最低衬砌厚度的计算方法。
The utility model comprises a lining core, a biological specimen struck on the lining core, and two layers of transparent protective films arranged outside the lining core and the biological specimen.
本实用新型包括了衬芯，贴放在衬芯上的生物标本，以及置于衬芯和标本外面的二层透明保护膜。
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