... 国产物量实验室〔英国〕 National Physical Laboratory 天然岩 native rock 钠、蒸气热交换器 Na-to-steam heat exchanger ...
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天然岩石群 rockwork
天然岩锲 natural chock stones
公路工程中天然岩沥青 UINTAITE
天然岩浆 ayan
天然岩盐 natural rock salt
天然岩石的实验室模拟 Rock simulation experiment
天然板岩 Natural Slate ; Natur
含天然气片岩 gas schist
在宏观尺度上天然岩体又为多种地质构造面（节理、断层和弱面）所切割。
At the macro-scale natural rock is cut by a variety of geological structures (joints, faults and weak-side).
通过这种方法，从叶岩、煤炭以及其他渗透性差的地质构造中提取的天然气，更容易也更便宜。
This has made it much easier and cheaper to extract gas from shale, coal and other less permeable geological formations (which yield so-called “tight gas”).
另一种叶岩天然气怀疑理论来自金融时报作家John Dizard。
Another shale gas sceptic is Financial Times writer John Dizard.
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