网络与数据通信 网络互联 释文 Internet engineering task force, IETF 因特网工程任务组
- piston refrigerator
- piston ring seal
- piston rod
- piston-rod
- piston rod packing
- piston seals
- piston stroke
- piston stroke-bore ratio
- piston type formation
- pistosaurs
- P.I.Stuchka
- pi-system
- pit
- pitahaya
- pit and adit engineering
- pit and fissure sealant
- pitaya
- pitaya stem rot
- pit bottom
- Pitcairn Islands
- pit canal
- pit cavity
- pit cell
- pitch
- pitch accent