The pull rod is screwed into the inside thread of the anchor head. 将拉杆旋入锚头内的丝扣。
Large span double box-beam rod structure is born out of BSS. 大跨度双箱梁钢棒拉杆组合钢结构即脱胎于张弦梁结构。
Experiment results show that removing the surface broken crystal layer of the cold drawn rod can prevent heat treatment induced cracks. 实验结果表明，热处理前去掉冷拉棒表面的碎晶层可以防止它在热处理过程中产生裂纹。
