The I type shear blocks dowelled bidirectional hollow plates (I SBDBHPs) are the most widely used.

剪力键式双向空中Ⅰ型（简称Ⅰ型空），该类空中使用最多型。

This paper puts forward a new type of bolted anti-creepers, which changes the fixture mode of the dowelled anti-creeper.

提出了新型螺栓式钢轨防爬器，改变了穿销式防爬器紧固方式。