A self-retaining suture comprises a composite filament. A start and an end of a longitudinal marking on the moving conveyor belt are detected. The cable end fitting retainer assembly further includes a cable wire support extending from the conduit end fitting and located beneath the end fitting retainer arm to contact the cable. Thus, malfunctions caused by such as off leakage currents of transistors or the like can be reliably prevented without causing an increase in access time. The oil is heated and transesterified in the presence of alkyl alcohol and the transesterification catalyst in a closed, recirculating transesterification flow system under slight cavitation to yield product alkyl ester and product glycerol.