Beneficiation of scheelite

The beneficiation of scheelite can be combined with re-election and flotation, or a single flotation method according to the characteristics of ore-dyeing. Individual scheelite ore dressing plants are also pre-.......

What is the first Fresnel zone of an antenna

The microwave transmission can be understood as simple as this: There are direct waves and reflected waves in the propagation path from the transmitter to the receiver. The oval area under the direct wave is called the Fresnel zone. The odd Fresnel zone differs from the direct wave by an odd .......