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aperture blockage
 aperture blockage
space 孔径遮挡
| loss
 loss
gen. ; 亏损
el.mach. 功率损耗; 损耗
environ. 损失
hydroel.st. 损失; 损耗
IMF. 坏账

to phrases
aperture blockage
space 孔径遮挡
aperture blockage loss
: 1 phrase in 1 subject
Air defense1