Rubber boot must have doublegroove on lip and not single as per your sample.
胶靴 启动槽上必须有双重唇而不是单一的按你的样品。
2
The doublegroove steel is suspended under the two nodes of bottom chord of steel roof truss to prevent the bottom chord from stretch bending.
文章论述了在设计中采用钢屋架下弦两节点下悬吊双槽钢作为分布梁避免钢屋架下弦拉弯工作。
3
So this paper is related to the study of basic forming principles of cold rolling for doublegroove ball bearing outer rings from theory, numerical simulation and experiment.