combined check meaning in English
合并支票
Examples
- Devices with moving parts for the prevention of contamination of water by backflow - specification for combined check and anti - vacuum valves of nominal size up to and including dn 42
防止回流水污染用带动件装置.第4部分:公称尺寸小于等于dn42的组合单向阀和反压力阀规范