Valves have been specified as Ballvalvetype, however the Contractor may offer an alternative recommendation, subject to approval by Client.
阀门类型规定为球阀，但承包商可提出不同建议，由业主批准。
2
A kind of slope slots and embeded plates hoisting expanding typevalve sealing mechanism which is suitable for ball valves, butterfly valves and plug valves is introduced.
介绍了一种适用于球阀、蝶阀和旋塞阀的斜槽插板升降撑拢式阀门密封结构。
3
A type of dual slots helix hoisting composite valve switch mechanism which is suitable for ball valves, butterfly valves and plug valves is introduced.