名詞
詠春手法之一，用前臂(臂膀)架響胸前，手掌斜斜地垂低並微微前伸，用嚟卸走對方正面拳擊 bong sau or wing arm/hand, an arm gesture of Wing Chung, to put the forearm in front of the chest with the hand swings down and slightly outward, as a bumper of straight punch.
低膀手
低膀手
lower bong sau
膀手不留橋
膀手不留桥
bong sau should not stay hold without movement