透湿率 meaning in Chinese

test method for vapor transmission rate of packaging materials

Methods for determination of water vapour transmission rate of sheet materials paper and board by dynamic sweep and static gas methods
用动态吹气和静态气体法对纸和纸板的水蒸汽透湿率的测定方法
The moisture permeability standard of the field operation ammunition envelop material was reasoned through calculation of the relative humidity in the interior of the envelop
摘要通过计算封套内部的相对湿度，论证了野战弹药封套材料的透湿率指标。