Rotation speed is one of the key reasons which are relative to the quality of friction stir welds and tunnel defect existes at lower rotation speed. 攪拌工具旋轉速度是影響接頭成型形貌的關(guān)鍵原因之一，速度過(guò)低有可能會(huì )導致隧道型孔洞缺陷。
Linkages scissored from the twirling pendulums slide up a sleeve on the pole, levering a valve which controls the speed of rotation by adjusting the steam. 與旋轉的擺成剪狀交叉的聯(lián)動(dòng)裝置把柱子上的滑動(dòng)套筒頂起，扳動(dòng)一個(gè)閥門(mén)，一個(gè)通過(guò)對蒸汽進(jìn)行調整從而控制旋轉速度的閥門(mén)。
