A call routing device in a communication network is re-entrant to permit a set of call routing rules to be applied more than once. Ordering of tape courses is analyzed to determine the time required to move between courses using a time function that reflects operating characteristics and limitations of the tape laydown machine. Some of the tube-to-fitting couplings are friction-fit connections, some are glued connections and others are quick connectdisconnect connections for rapid assembly and disassembly of the greenhouse. and also possible to lengthen the life span of the filters. During the axial adjustment, some of the pressure rollers andor the cutting knives remain stationary, some of the pressure rollers andor cutting knives are adjusted by a first adjustment travel andor some of the pressure rollers andor cutting knives being adjusted by a second adjustment travel.