The principle and technique of sealing of shaft end of the 1150SBD-12 centrifugal gravel pump are introduced.
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。
Long spiral hole pump pressure CFG (Cement Flyash Gravel) pile construction technology has such advantages as small noise, quick construction rate and low construction price.
长螺旋钻孔管内泵压CFG桩成桩混合材料施工方法，具有施工噪音低，成桩速度快，工程造价较低等特点。
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