pervious barrier
... perveance 导电系数；导流系数 pervious barrier 透水壁 pervious bed 渗透层 ...
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用B 205制成的聚丙烯瓶具有机械强度高、透明性好、透水性小、耐蠕变和瓶壁薄的特点。
The bottle made of speciality resin B 205 possessed characters of high mechanical strength, good transparency, low permeability of water, creep resistance and thin wall.
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