Mineral oil for helical-lobe compressor is diluted and this increases the fault of compressor.
原来用于螺杆压缩机的矿物油因与瓦斯气混溶而被稀释，使压缩机的故障率大增。
3
With the helical antenna and a V-shaped plate antenna as a unit antenna and the second-order hexagon as the array, the antennas are integrated and simulated and get the low side-lobe characteristics.