由于采用钢刷支撑结构，因而又具有扫线功能，可将管道内的砂石杂物推出。
A scavenger function is realized because of the steel brush braced structure, and it can clean the sandstone and sundries in the pipeline.
本文通过对广东和海南海岸沙丘砂石英颗粒的扫描电镜分析，认为其表面结构特征，既具有典型的风成环境特征。
Quartz grain surface textures in coastal dune sand which is mainly derived from beach sand have features characteristic of both typical aeolian environment and inheritable and reformable beach sand.
介绍了150SBD-12型离心式砂石泵轴端密封的结构原理和相应的技术措施。
The principle and technique of sealing of shaft end of the 1150SBD-12 centrifugal gravel pump are introduced.
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