Inquiry (采购产品): Sifter Parts We managed to break the tension springs in for the 8"/12" selector switch in both of our model #637 sifters. What is the availability of these parts, and how much do they cost. Also, we don't have an operators manual for the machines. Could we get one of those? Dave Vosler Geotechnical Testing Laboratory Olympia, WA **** Hidden Message ***** Hal Parks 10011 Blomberg St SW Olympia, WA 98512 USA Company: Geotechnical Testing Laboratory Phone: 360-754-4612 Fax: 360-754-4848 E-mail: geotestlab@comcast.net **** Hidden Message ***** geotestlab@comcast.net