A water pipe is hollow.
水管是空心。
A water pipe is hollow.
水管是空心。
The I type shear blocks dowelled bidirectional hollow plates (I SBDBHPs) are the most widely used.
剪力键式双向空心大中Ⅰ(简称Ⅰ空心大),是该类空心大中使用最多一种。
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.
摘要提出了一种新空心微针阵加工方法,利用三次同步辐射曝光和显影程来加工微针。
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.
介绍了两种大断面空心材在程中存在问题,阐述了改进模具具体措施和生产时结果.
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