Inquiry (采购产品): information I am thinking about trying to use a pneumatic tube system to transport goods. I would like to know how often does someone have to work on one of your systems after the are installed. The maintenance of the system. Thank you Nick **** Hidden Message ***** Nick Carter 72756 Company: Digital world productions Inc E-mail: nick@dwp-av.com **** Hidden Message ***** nick@dwp-av.com
