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- Definition of gate valve
- Classification of gate valve
- Advantage and disadvantage of gate valve
- Drift diameter shrink of gate valve
- Standard collectton of gate valve
- Functton，structural specification，and characteristics of flat gate valve
- Compensation type double disc flat gate valve structural characteristics
- Flowrate feature analysis of flat gate valve
- Applicable working conditions and operation of gate valve
- Installation and maintain of gate valve
- Knowledge of knife gate valve
- National standard gate valve characteristics
- Rising stem wedge gate valve knowledge
- And the design of iron gate
- And gate CAD/CAM system research (a)
- The gate of CAD/CAM system research (2)
