top chord是什么意思

网络释义

1)top chord,上弦杆2)upper chord of roof truss,屋架上弦杆3)polygonal top-chord,折线形上弦杆4)tightening,上弦5)around beam,上弦梁6)first Quarter Moon,上弦月

Analyzing the influence of the around beam s stiffness on the strength and stiffness of the locomotive body;

上弦梁刚度对机车车体强度和刚度的影响分析