stiff arc的意思|示意

Stiff arc, with heat concentrated, easy to fill welding wire, so especially suitable for wire filling welding in bicycle area.

电弧挺度好，热量集中，填丝容易，特别适宜自行车等行业的填丝焊接。

Keeping the arm as stiff as a board, swing it in an arc-like motion from the shoulder, making contact in front of the shoulder.

臂要伸直，并保持伸直的姿式不变，以肩为轴把球拍划出弧线，在肩部的前方勾击来球。