An image stabilizer includes a driver having a coil and magnet, where a correcting lens on a moving frame is moved by the driver in a first direction perpendicular to an optical axis of a lens system and in a second direction perpendicular to the first direction and optical axis, and an optical axis of the correcting lens corresponds with the optical axis of the lens system. The blowable insulation material is composed of plural units each having a number of filaments that are fused at one end of the unit and are open at an opposite end. When the covering element is in a second position, an actuation of the tappet, which inevitably occurs when the covering element is displaced, ensures that the main valve is located in the closed position. The second path includes a modulator configured to remodulate the centralized lightwave carrier signal with upstream data to produce an upstream data signal for upstream transmission. The cover member has a shape that is curved to not intersect a locus of the case end part when the case section is tilted with respect to the steering post. A second machining unit is arranged laterally next to the first machining unit in such a way that, alternating with the first machining unit, it can reach the workpieces in the working area from the same direction.