A carbon steel liner is utilized to provide a leak proof vaporbarrier for containment of concrete construction.
为防止混凝土结构的安全壳泄露，其内部有碳钢的衬垫。
2
Therefore, water vapor permeability of flexible packaging material (or barrier) of the test of testing more and more important in the packaging.
因此，对软包装材料透气透湿性（或阻隔性）的测试研究在包装测试中越来越重要。
3
Biax-orientation Nylon6(BOPA) film is a new type of top grade packaging material with outstanding properties including cold-proof, heat-proof, oil resistance and good gas, water vaporbarrier etc.