http://www.idph.state.il.us/envhealth/factsheets/polychlorinatedbiphenyls.htm#:~:text=Polychlorinated%20biphenyls%20(PCBs)%20are%20a,equipment%20like%20capacitors%20and%20transformers.
• 是呀 -外乡人- ♂ (312 bytes) () 03/29/2024 postreply 06:42:01