压盖密封 meaning in English

gland packing
gland seal

Ductile iron pipes and fittings - bolted gland joints - assembly , sockets , counter ring , sealing ring , bolts and nuts
球墨铸铁管及管件.栓接压盖密封接头.组件套管中
In allusion to the leaking of packing of gate valve , this paper presents technical improvement measures in properly selecting packing material and varying the structure of packing assembly
摘要针对闸阀阀杆填料密封泄漏的问题，提出了正确选择密封填料的材料和改进闸阀填料压盖密封件结构的技术改进措施。