supplies blood to the anterior (front) parts of the scalp, ear, face, neck, and side of the head. Facial artery external maxillary artery supplies blood to the lower region of the face, mouth, and nose.
Axle bushing is an independent plain bearing that is inserted into a housing to provide a bearing surface for rotary applications; this is the most common form of a plain bearing.[8] Common designs include solid (sleeve and flanged), split, and clenched bushings.
The kingpin is the mechanism on the trailer that locks it to a road tractor. It is typically positioned between 18 to 48 from the trailer nose. A greased metal grid plate surrounds the kingpin. This grid plate allows the fifth wheel to slide underneath the trailer. When the tractor is backed into the nose of a trailer, the fifth wheel pivots and slides underneath the trailer's grid plate. The fifth wheel then locks onto the trailer's king pin. When coupled to the kingpin, the fifth wheel enables the semi trailer to rotate at the point where the fifth wheel and kingpin are joined.