网络与数据通信 有线网络 释文 procedural characteristics 规程特性
- pyrazolone
- pyrazosulfuron-ethyl
- pyrene
- pyreneite
- pyrenocarp
- pyrenoid
- pyrenolichen
- pyrenomycetes
- pyrethrin
- pyrethrins
- pyrethroid
- pyrethroid insecticides
- pyrethroid pesticides
- pyrethroid poisoning
- Pyrex
- pyrex
- pyrheliometer
- pyrheliometry
- pyribambenz-isopropyl
- pyribambenz-propyl
- pyridaben
- pyridazine
- pyridine
- pyridine alkaloid
- pyridine poisoning