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。
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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