Cone - shaped bayonet ring couplings for rolling stock part 2 : rubber sealing rings 机车车辆用锥面卡套式管接头.第2部分:橡胶密封环
2.
Curved - face bayonet ring couplings for rolling stock part 4 : aubber sealing rings 机车车辆用曲面卡套式管接头.第4部分:橡胶密封环
3.
Rubber seal ring 橡胶密封环
4.
Plastics piping systems - thermoplastics piping systems for buried non - pressure applications - test methods for leaktightness of elastomeric sealing ring type joints 塑料管道系统.用于地下无压装置的热塑性管道系统.橡胶密封环型连接件密封性的试验方法