A gas spring lock for engaging and locking a gas spring in the extended position so that covers of spas, hot tubs and other similar apparatus that employ gas springs can be safely locked into an open position. Dielectric material is deposited, filling the upper portions of the first openings and creating trench isolation region. The top of the reactive distillation tower is retained at 25\xb0 C. The profile sections at each distance Z are joined smoothly to one another to form a complete airfoil shape. Throughput can be improved by heating the evaporation holder 903 in advance of transporting containers into the evaporation holder 903.