The present invention provides an apparatus for performing an operation in a fluid conduit of a hydrocarbon exploration or production installation and methods of use. In the start control device, a motor drive torque estimating part estimates a motor drive torque based on a battery voltage drop amount of a battery that supplies an electric power to a motor. The safety key is backward compatible and is relatively difficult to copy. The carpet may be dyed by using the aqueous dyeing solution of 45 to 90 C. The toy includes devices that operate under the control of the computer to provide the toy with a variety of abilities such as speech, gestures and walking. After forming the silicon germanium single crystalline layer to a predefined thickness, a silicon single crystalline layer can be further grown at the silicon germanium single crystalline layer.