A system controls reproduction of a video transmission between a transmitter and a receiver. A first generally hollow extension section is selectably coupled to the open end of the main bin. The first screenshot is stored in association with the segment of source code. A part of an outer peripheral surface of the coil is covered with the magnetic core of the outer peripheral surface of the coil is directly contacted with the inner bottom surface of the case, heat of the coil can be directly dissipated such that the heat is released through the case to an installation target, e. The machine is set up to decide whether a movement of the control element which is sensed is a regular control movement or an emergency stop movement, and to change the work-performing unit to the inactive state if it is decided that the movement sensed is an emergency stop movement. After establishing a voice communication line between mobile phone 100-2, mobile phone 100-1 establishes a data communication line with mobile phone 100-2 and acquires image data.