The copper-clad invar sheet material prepared by use of said method has the low coefficient of expansion, good radiating capability, large capacitance and good electromagneticscreening effect.
利用本方法制备的覆铜因瓦片材，具有热膨胀系数低，散热性好，电容量大，电磁屏蔽性好；
2
Frequency screen is a new high efficiency machine and has the advantages of electromagnetic vibration, high frequency, high capacity and high screening efficiency.
复频筛是一种新型高效的筛分设备，具有电磁振动、高频率、设备处理能力大、筛分效率高等优点。
3
The low frequency screening effect against electromagnetic influence is very strong in urban areas because there are a lot of underground metallic pipes.