Various systems and method are described for controlling an engine having an exhaust system which includes a particulate filter. The frame has a receiving area which is sized and shaped to removably receive an end of at least one electronic module. One of the terminals is correspondingly provided for at least one of the plurality of floors and another of the terminals is correspondingly provided for the car and at least one of a counterweight. The latter in turn is important to infinite sharpness. The nitride layer is on a semiconductor substrate, a photoresist layer is on the nitride layer, and the plasma is prepared from a gas mixture comprising CF4 and CHF3 at a pressure of at least 10 mTorr. The flame retardant composition comprises a mixture of a resin having an average particle diameter of not more than 1000 \u03bcm selected from wholly aromatic polyamide, polyimide, polyamideimide, a copolymer of the wholly aromatic polyamide, the polyimide or the polyamideimide or a mixture of the above mentioned polymers and a metal hydrate.