比例流量分配阀
proportional flow divider valve
高低压级质量流量比
Refrigeration quality flow rate of the high and low pressure system
质量流量比敏感型检测器
mass flow rate sensitive detector
自动流量比例控制器
automatic flow ratio controller
比例取样器
proportional sampler
proportional sampling device
sampler
Proportional
组内取样比例
Sampling proportion within group