A disk apparatus compatible with a disk cartridge having a large head window even with a small external size. With the food processor of the present disclosure, the thickness of cut-out food can be adjusted without removing the lid, which is convenient for operating. The present invention also provides electro-optic devices including an electro-optic ceramic material including lead, magnesium, niobium and titanium having a propagation loss of less than about 3 dBcm and a quadratic electro-optic coefficient of greater than about 2\xd710\u221216 m2V2 at 20\xb0 C. The top-level partition has top-level constraints. The drive lever encloses an angle of approximately 90 with the coupling element in a parking position of the windshield wiper and is adjustable about an adjustment axis which runs approximately parallel to the coupling element and intersects the longitudinal axis of the driveshaft, and the coupling element is connected to the link rod via a ball joint. The first subcircuit may be a power amplifier.