counter circulation coring 反循环取心
pneumatic counter-circulation 气动反循环
Circulation pump frequency counter 热网循环泵变频柜
circulation counter current 逆流循环
circulation counter 循环计数器
Due to unstable sea level, drilling by using 6bs counter circulation pump is not very suitable.
在浅海岸边进行钻机作业，由于海平面水位不稳定，采用6 BS反循环泵已不合适。
Some superiorities of using down hole hammer counter circulation type continuous coring (sampling) method in gold ore exploration are expounded in this paper.
文中阐述了在金矿勘探中应用潜孔锤反循环连续取心（样）的优越性；
The method of design of arbitrary cany counter of unnatural sequence circulation by use of medium - scale counter core is discussed. It finds wide application in the special circulation counter.
探讨利用中规模计数器芯片设计按非自然顺序循环的任意进制计数器方法，该方法在特殊循环计数器设计的应用中，有着广泛的应用。
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