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primary valve
auto. 第一级阀液化石油气发动机蒸发器初级减压室燃料入口处的阀门; 主阀控制主V 带轮的阀
avia. 根部阀
tech. 主阀
primary valve
: 13 phrases in 7 subjects
Automobiles5
Aviation2
Compressors2
Construction1
Electronics1
Laboratory equipment1
Technology1