为了降低三缸单作用钻井泵的压力和排量波动，通常在排出管线上安装有空气包。
In order to reduce the fluctuation of pressure and discharge capacity of the triplex drilling pump, the air accumulator is often fixed on the discharge pipe.
目前优化后的包型已经稳定应用，以管线钢为例，夹杂物合格率提高了5％以上，提高了中间包的冶金功能。
The optimized tundish has been used stably, for pipeline steel, the qualified percent of inclusion is increased more than 5%, and metallurgical function of the tundish was improved greatly.
平时不要象管线工那样在包里放上12把不同的螺丝刀才感到放心。
Only cable guys have 12 different screwdrivers to guarantee the full-gear status every day.
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