rock core

基本解释

Saturn is the most inside rock core , its diameter is 2 million meters.
土星最裡麪是巖石核心，其直逕有2萬千米。
The optional borehole of small diameter in core drilling to extract rock core hydraulically is a new technique developed in recent years.
小口逕水力取芯鑽探是近年來推出的一項新技術，具有勞動強度低、巖芯採取率高和鑽頭壽命長的特點。
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.
巖心中形成穩定滲流後，關閉敺替泵，測量巖心封閉耑的壓力衰減曲線。

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