Inquiry (采购产品): friction How can you make friction with a sponge,string,plates,and a peice? **** Hidden Message ***** Richard Mora 47th pl 269 San Pedro Los Angeles90011 USA Company: none Title: Friction Phone: (323)220-6245 Fax: none E-mail: jlb0641@lausd.k12.ca.us **** Hidden Message ***** jlb0641@lausd.k12.ca.us
