Watervapourtransmissionrate: An indication which determines the waterproof qualities of packaging paper.
透湿度：鉴定包装纸的防水性能的质量指标。
2
Results showed that composite material had good biological defence property and watervapourtransmissionrate. Biological clothing had a reasonable structure.
结果表明：该复合面料具有优良的生物防护性和透湿性，防护服结构合理。
3
Watervapourtransmissionrate (WVTR) : Mass of watervapour transmitted through a unit area in a unit time under specified conditions of temperature and humidity.