The top-head has large torque, wide range of speed, big pull force.
动力方扭矩大、转速范围广，起拔力大。
After the cycle test, the door shall meet the pull force requirements of section25.
循环试验结束后，后斜门应满足第25部分的拉力要求。
The door may be supported in a horizontal plane during the pull force measurement test.
在拉力测量期间，可以在水平面内对门进行支承。
The door may be supported in a horizontal plane during the pull force measurement test.
在拉力测量期间，可以在水平面内对门进行支承。
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