The difference between action mechanism of hole-bottom priming and hole-mouth priming was stated. The field tests for hole-bottom priming 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。

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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。

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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.

该研究的初步数据表明，去除底部4片叶消除脚叶等级，去除底部8片叶消除脚叶和下部叶等级。

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