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1·Compared with conventional beam pumping unit, the swing-rod beam pumping unit can reduce the maximum crank axle torque markedly, reduce and even eliminate negative crank axle torque.

同常规型游梁式抽油机比较，该机型可以显著降低曲柄输出轴的最大扭矩，减小甚至消除负扭矩，在降低能耗的同时改善了减速箱的受力状况。

2·The utility model has the advantages of increasing the mechanical strength of the crank of the bent axle so that the utility model will not break even being overloaded.

优点是增强了曲轴曲柄的机械强度，使其在超负荷的情况下运行也不易折断。

3·The bottom bracket axle is permanently mounted to the right hand crank and has splines for the left hand crank.

而中轴本身是和(安装大飞的)曲柄连为一体的。

4·According to the spool thread shape difference, the axis may divide into the crank and the straight axle two kinds.

依据轴线外形的不同，轴可以分为曲轴和直轴两类。