closing signal造句

• So the issue is whether or not the case switch will send the new drive the open / close signal.
• The button on the case is not a mechanical button that presses the button on the drive-it must be an electrical button that sends an open / close signal.
• The line has traffic signal preemption, so the trams send a signal to the traffic light control when the driver starts the door-closing signal to give the tram priority at traffic lights.
• But Siemens realises further improvements in the ventilation ( the vehicles were ordered without air conditioning ), and door closing signals will be changed, after inhabitants of the streets passed complained that they are too loud by night.