The I type shear blocks dowelled bidirectional hollow plates (I SBDBHPs) are the most widely used.
剪力键式双向
大板中
Ⅰ型板（简称Ⅰ型大板），是该类大板中使用最多一种板型。
The I type shear blocks dowelled bidirectional hollow plates (I SBDBHPs) are the most widely used.
剪力键式双向大板中Ⅰ型板（简称Ⅰ型大板），是该类大板中使用最多一种板型。
A water pipe is hollow.
水管是。
A new fabrication method for hollow microneedle array is proposed with three times exposures in deep X-ray lithography of synchrotron radiation and the development procedure.
摘要提出了一种新微针阵
加工方法，利用三次同步辐射曝光
过程来加工微针。
The problems existed in extrusion process of two sorts large section hollow extrusion profilesare introduced. The concrete measure and extrusion consequence of the improved prothole die are given.
介绍了两种大断面型材在挤压过程中存在问题，阐述了改进挤压模具具体措施生产时挤压结果.
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