A water pipe is hollow.
水管是的。
A water pipe is hollow.
水管是的。
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的Ⅰ
板(简
Ⅰ
大板),是该类
大板中使用最多的一种板
。
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.
摘要提出了一种新的微针阵
加工方法,利用三次同步辐射曝光和显影过程来加工微针。
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.
介绍了两种大断面的在挤压过程中存在的问题,阐述了改进挤压模具的具体措施和生产时的挤压结果.
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