乒乓球直拍长胶倒板打法VS横拍弧圈打法的技术比较起弧比交流电容易，电弧加长一倍。
On the Penholder Anti-Topspin Reacting Play VS Knife Grip Two-Side Loop Tactics and Training Methods ; Arcs more readily than AC welders , with longer arcing .
长胶