Abstract: A lower back support system (LBSS) that provides increased support to a person's lower spine and back muscle group. The LBSS includes a first belt, a second belt, a quick release buckle and an adjustable belt glide. Additionally, a back rack that consists of a first shoulder support, a second shoulder support as well as other yoke, front and side supports can also be utilized. Substantially centered and attached by an attachment device to the front of the first belt is an abdominal support brace. Substantially centered and attached to the rear of the first belt is a back support brace which is specially designed and dimensioned to provide maximum support to a typical person's lower back. When wearing the LBSS a person is more protected against strain and injury by supporting his/her lower back when lifting, carrying or wearing an object(s) or being physically jarred. The LBSS shifts load from a person's single spine to their two legs.

Abstract: An exhaust includes a wall that has a first composite material having a first coefficient of thermal expansion and a second composite material having a second coefficient of the thermal expansion that is less than the first coefficient of thermal expansion.

Abstract: An exhaust includes a wall that has a first composite material having a first coefficient of thermal expansion and a second composite material having a second coefficient of the thermal expansion that is less than the first coefficient of thermal expansion.

Abstract: In a method of making carbon or graphite yarn, a bundle of single ply precursor yarns is knit into an elongated fabric to facilitate subsequent processing of the yarns. The elongated fabric is pretreated to facilitate carbonization thereof such as by being advanced in the direction of elongation thereof through a cleaning process. Thereafter the yarns remain in the form of the fabric to facilitate processing thereof through at least a carbonization step. The carbonization step may be accomplished by winding the elongated fabric onto skeins to a desired extent and then severing the fabric, following which the skeins are disposed in a carbonizing oven to at least partially carbonize the yarns. Thereafter, the fabric length on each skein may be deknitted, and the resulting bundle of single ply yarns is twisted to form a multi-ply yarn which is then fired to substantially raise the percentage of carbon in the yarns and then graphitized.