1.
All surfaces inside the building should be of impervious material to permit thorough washing.
建筑里所有的表面都应当用不透水的材料这样可以彻底清洗。
2.
Oxygen Permeability of Plastics Pipes Applied for Cold and Hot Water
冷热水用塑料管材透氧率的测试方法
3.
Study and Application for the Waterproof Breathable Material on Spacecraft
防水透气材料在航天器上的应用研究
4.
Quality inspection of parent material of cementitious capillary crystalline waterproof material
渗透结晶型防水材料中母料生产的质量检测
5.
The washbasin shall be made of easy-to-clean and impervious material.
洗手台内外应使用易清洗不透水材料构筑。
6.
Research on the Adsorption of Water Premeable Cement-Based to Heavy Metal Ions;
可吸附重金属离子的透水性水泥基材料研究
7.
Conservation of water sensitive objects with moisture permeable materials;
透水气材料在水敏感性文物保护中的应用
8.
Analysis on mechanism of cementitious capillary crystalline waterproofing materials
水泥基渗透结晶型防水材料的作用机理分析
9.
The application of cement based capillary crystalline waterproof material in engineering
水泥基渗透结晶型防水材料在工程中的应用
10.
Research of cementitious capillary crystalline waterproofing material modified by multi-component
多组分改性水泥基渗透结晶型防水材料的研究
11.
Study on Screen-penerating Performance of Grains with Different Material and Shape;
不同材料形状物料颗粒透筛性能的研究
12.
testing method for water vapor transmission rate of flexible barrier materials
柔性阻挡层材料的水蒸汽穿透性的试验方法
13.
Preparation,Properties of Pervius Concrete Pavement Material;
透水性混凝土路面材料的制备及性能研究
14.
Study on Influence of Admixture Material on Compressive Strength and Permeability of Cement Stabilized Soil
外掺材料对水泥土强度及渗透性能影响的研究
15.
Performance and Microstructure of Ultra Low Ion Permeability Cementitious Materials
超低离子渗透性水泥基材料的性能与微观结构
16.
The material is impermeable to air and fluids and can withstand at least eight hours of exposure to corrosive chlorine and ammonia gas.
这种材料不透气亦不渗水，且暴露于具腐蚀性的氯气与氨气下时，至少能耐得住八小时。
17.
The degree of optical opacity of a medium or material, as of a photographic negative.
不透光度一定介质或材料（例如照相感光纸）的不透光程度
18.
permeability of tunnel fill material
炮眼充填材料的渗透率