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方向滤波器
geophys. direction filter
oil anisotropic filter; trend-pass filtering
radio direction filter equipment
telecom. directional filter
方向定向滤波器
mil., air.def. directional filter
方向〔分向〕滤波器
el. directional filter
方 向 滤波器
: 2 phrases in 2 subjects
Air defense1
Electronics1