以前煤礦發達工業，又是山多製造業多。 也有一些農業 lancaster 等等

https://www.ibisworld.com/united-states/economic-profiles/pennsylvania/#:~:text=What%20are%20Pennsylvania's%20Largest%20Industries,and%20%2481.2b%20in%202024.&text=1.&text=2.