Micro computer processor to ensure the setting of the bag length without changing any parts.Please counter,bag length, p微电脑袋长控制器，可任意设置袋长而无须更换零件，并可预制计数，显示包装速度，袋长等。
While descending to 3000 feet, a barge swan shot past smashed the pilot tube (pilot head), air speed indicator out of or在下降到3000英尺的过程中，一只大天鹅很快越过，撞坏了空速管。真空速表失效。