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扩张比
tech. divergence ratio
telecom. ratio of expansion
扩张比指空气滤清器壳体最大直径部分断面面积与进气口断面面积的比值
auto. spread ratio
喷管面积扩张比
space expansion ratio
扩张比
: 8 phrases in 4 subjects
Aviation1
General1
Space5
Technology1

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