The difference between action mechanism of hole-bottompriming and hole-mouth priming was stated. The field tests for hole-bottompriming were done.
对孔底起爆和孔口起爆的作用机理作了对比分析，并对孔底起爆技术进行了现场爆破试验。
2
CLZ Series Marine vertical self-priming centrifugal pumps are used at cabin bottom to cool water and fight fire.
CLZ系列船用立式自吸离心泵适用于船舶载泵、舱底泵、冷却泵、消防泵及总用泵等。
3
Preliminary data from this study indicates that removal of the bottom four leaves eliminates priming grades and the removal of the bottom eight leaves eliminates priming and lug grades.