它的翼膀和肢臂处则是翼尖黑色的白羽毛。
Its body was dark gray, but its limb feathers were white with black tips.
通气孔通常在翼尖或尾部，这些通气孔可以保持压力恒定。
Vents, usually at the wing tips or tail, keep the pressure constant.
它是具有带黑翼尖的白色羽毛的大型塘鹅。
翼尖有铅条配重，表面蒙乳白色热缩膜。
It used a lead wire weight at tip. On surface is white PVC Shrink Tubing.
系带翼尖设计。
系带翼尖设计。
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