求翻译：在机器前侧机头的墙板上装上光幕接收器2，在机尾的墙板上装上光幕发射器1。机器前侧的光幕接收器和发射器体积比较小。是什么意思？

Light curtain receiver on the the wallboard tops of the front side of the machine head 2, in the tail of the wallboard installed on the light curtain emitter 1. Light curtain receiver and transmitter volume of the front side of the machine is relatively small.

On the machine front side panels on the wall of the unit mounted on the receiver is on 2, in the end of the wall panel mounted on the transmitter on 1. The front side of the receiver and the transmitter volume is small.

Installs the light curtain receiver in on the machine ventral nose wall plate 2, installs the light curtain launcher on the airplane tail wall plate 1.The machine ventral light curtain receiver and the launcher volume quite is small.

At the front side of the machine head put glazing curtain wall plate receiver 2, tail put glazing curtain wall plate transmitter 1. In front of screens on the side of the receiver and the transmitter volume is relatively small.

正在翻译，请等待...