rock core

基本解释

Saturn is the most inside rock core , its diameter is 2 million meters.
土星最里面是岩石核心，其直径有2万千米。
The optional borehole of small diameter in core drilling to extract rock core hydraulically is a new technique developed in recent years.
小口径水力取芯钻探是近年来推出的一项新技术，具有劳动强度低、岩芯采取率高和钻头寿命长的特点。
After establishing a steady flow in the rock core, the pump was stopped, the pressure decrease at the closed end of the rock core was recorded.
岩心中形成稳定渗流后，关闭驱替泵，测量岩心封闭端的压力衰减曲线。

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