The roof separationlayer is the biggest security hidden danger in bolt support tunnel.
顶板离层是锚杆支护巷道最大的安全隐患之一。
2
The dispersion and propagation loss can be reduced significantly by properly choosing the thicknesses of the two magnetic films and separationlayer.
分析了两个磁性层和间隔层的厚度对静磁后向体波色散和传播损耗的影响。
3
Waterproof coiled materials of SBS are a flexible felt of polyester fibre as casing, SBS modified asphalt as coating and polyethylene film as antiseizing separationlayer.