Inquiry (采购产品): Lab Sifters I have 3 Mary Ann model 637 sifters and need a maintenace diagram or info on best way to clean and maintain them without tearing the whole machine down. Any info will be greatly appreciated. **** Hidden Message ***** Michael Thompson 5001 LakeLand Blvd Mattoon, IL 61938 USA Company: Lake Land College Title: Lab Manager Phone: 217-234-5461 E-mail: mwt73@yahoo.com **** Hidden Message ***** mwt73@yahoo.com