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valve area
auto. 气门最大开启面积; 气门头部在燃烧室中面积
compr. 气阀面积
refrig. 阀门流通截面积; 阀断面
surg. 瓣膜面积
valve area
: 26 phrases in 5 subjects
Automobiles6
Compressors13
Nursing4
Surgery2
Technology1