The impact factor assessment method of curved bridge under moving vehicles mostly adopts the usages of straight beam Bridges, but not enough argumentations can demonstrate the reasonability.
我国的曲线梁桥汽车荷载冲击系数的取值目前仍普遍采用直线梁桥的研究成果，对其合理性缺少足够的研究。
Taking the rod string as the object of study, a method of computing pumping stroke and speed of walking beam pumping units for slant straight wells is also presented.
以抽油杆柱为研究对象，论述了斜直井游梁式抽油机冲程和冲次的计算方法。
Taking the rod string as the object of study, a method of computing pumping stroke and speed of walking beam pumping units for slant straight wells is also presented.
以抽油杆柱为研究对象，论述了斜直井游梁式抽油机冲程和冲次的计算方法。
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