Used to determine the water permeability of plastic drainage boards. The length of the sample is 330mm, the thickness of the latex film is 0.3mm, and the pressure of 350Kpa is applied to the sample as required.
【technical parameter】
1. Sample length: 440 mm
2. Water head difference: 200mm, hydraulic gradient 0.5
3. The effect and the stress above the sample are: 0～500kPa
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