Inquiry (采购产品): pneumatic systems Hi, I am a 7th grader doing a project. My invention is a mail delivery system like a bank for use by older or handicapped people. I have a house with 1/4 inch tubing going from the curb side mail box to a collection box inside. Any help with ideas or a way to provide a vacum to my project wuld be very helpful. My paper is to be 600 words or so. Thank you for any help. Cody Shelton Charlotte, NC **** Hidden Message ***** Cody Shelton 11143 Ballantyne Crossing ave. Charlotte, NC 28277 USA Company: Middle School Student E-mail: codyccs@aol.com **** Hidden Message ***** codyccs@aol.com
