The new monitors range in size from 15-inch to 42-inch models, and they offer options for mounting on walls, racks, and poles.
新的监测范围的大小从15英寸到42英寸的模式，他们提供选择安装在墙壁，机架，以及木杆上。
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The infrared sensors detects the shells when the fly across the plane. Another design is that there are only two upright poles in the shooting range, the infrared sensors can be fixed on the poles.