A solid-state relay is provided, which includes a first transistor, a second transistor, a first transmission circuit, and a second transmission circuit. A plurality of blades 25 are provided with extending portions 25b of the blades which extend outwardly in the direction of the diameter of the axis 9a of the motor 9 and rotate at such a space that is outside and surrounds the opening 13 in the space 17. Cured compositions of the present invention exhibit lower solvent swell, and similar or increased softness when compared to cured compositions containing no unsaturated, high molecular weight, endgroup-modified polymers. The unmanned air vehicle and the observation platform are displayed on a display device based on the received location of the unmanned air vehicle and the received location of the observation platform. Methods for enriching circulating tumor cells, and devices for enriching specific cells from cellular samples are also disclosed.