Many U-joint applications are available both greasable and nongreasable, and which is stronger has long been debated. Proponents of nongreasable U-joints state that drilling a hole in the cross of the U-joint and tapping it for a grease zerk weakens the body of the joint.any U-joint applications are available both greasable and nongreasable, and which is stronger has long been debated. Proponents of nongreasable U-joints state that drilling a hole in the cross of the U-joint and tapping it for a grease zerk weakens the body of the joint.
Answer: BAK files are Backup Files primarily associated with Unknown Apple II File (found on Golden Orchard Apple II CD Rom). BAK files are also associated with Backup and FileViewPro. Additional types of files may also be using the BAK file extension.
Test Information. Bone alkaline phosphatase (BAP) is the bone-specific isoform of alkaline phosphatase. A glycoprotein that is found on the surface of osteoblasts, BAP reflects the biosynthetic activity of these bone-forming cells. Serum levels of BAP are believed to reflect the metabolic status of osteoblasts.