5tX-Y高安全葫芦
5 t X-Y high security hoist
安全高电压接头
safe high voltage connector
安全高效
safe and high-efficient utilization
Safety and High Efficiency
Safety and efficient
Safety and highly effective
safe and highly efficient
Safe and Efficient
安全高效开采
safe and high-efficient exploitation
good safety and efficiency
垂直安全高度
vertical height of safe mining
更高安全标准
higher standard of safety
煤与瓦斯安全高效共采
safe and high-efficient exploitation of coal and g
safe and high-efficient exploitation of gas and co
最低安全高度
best forecasting frequency