Duplex system typically provide corrosion protection 1.5 to 2.5 times longer than the sum of the lifetimes of zinc and paint used individually. This characteristic is referred to as the Synergistic Effect. The extended corrosion resistance is the most obvious, and most important, reason for using a duplex system.
FIND OKLAHOMA DMV OFFICE LOCATIONS. CONTACT INFORMATION FOR THE STATE DPS. Telephone. Telephone customer service representatives are available to provide general information from 8:00 am to 4:30 pm for the Oklahoma Department of Public Safety and from 7:30 am to 4:30 pm for the Oklahoma Tax Commission Motor Vehicles Division, Monday through Friday.
1 High Cliff State Park is open year-round from 6 a.m. to 11 p.m.  Park office hours vary by season. From mid May to Labor Day, the park office will be open 7 days a week, 10 a.m. to 8 p.m., and later on Fridays. Labor Day thru mid-May 2015, the park office will be open Tuesday thru Sunday 10 a.m. to 4 p.m.