gzb

The general conditions, features and applications of GZB-90 light type high strength formwork system have been introduced here.

介绍GZB—90系列组合模板的概况、构造特征与工程应用等情况。

DXD Model Vertical Automatic Packager Series, HSP Model Transparent Film 3d Packaging Machine, GZB Pillow Model Automatic Packager Series.

DXD型系列立式包装机，HSP型系列透明膜三维包装机，GZB型系列枕式包装机。

Four propagation models of diffraction, line-of-sight, scatting and duct are analyzed. The basic transmission loss for each of the models is calculated according to the ITU-R model and GZB model.

分析了电波的地波绕射传播、视距传播、散射传播和波导传播等四种传播模式，根据ITU - R和GZB建议的模型分别计算了各传播模式的基本传输损耗。