Core sample

（重定向自Drilling core）

$Goniometers are used to measure angles of fractures and other features in a core sample relative to its standard orientation.$

A core sample is a cylindrical section of (usually) a naturally occurring substance. Most core samples are obtained by drilling with special drills into the substance, for example sediment or rock, with a hollow steel tube called a core drill. The hole made for the core sample is called the "core bowling". A variety of core samplers exist to sample different media under different conditions. More continue to be invented on a regular basis. In the coring process, the sample is pushed more or less intact into the tube. Removed from the tube in the laboratory, it is inspected and analyzed by different techniques and equipment depending on the type of data desired.

单词	Drilling core
释义	Drilling core 原声例句 PBS趣味科普 Much easier than drilling a deep ice core which is 3,000 meters and costs 50 million dollars. 比钻探 3000 米深、成本 5000 万美元的冰芯容易得多。 PBS访谈环境系列 Last season, they went much deeper, drilling out this long ice core a few miles away. It is nature's ancient history book for this glacier. 上个季节，他们走得更深，在几英里外钻出了这个长长的冰芯。这是自然界关于这条冰川的古老历史书。英语百科 Core sample （重定向自Drilling core） $Goniometers are used to measure angles of fractures and other features in a core sample relative to its standard orientation.$ A core sample is a cylindrical section of (usually) a naturally occurring substance. Most core samples are obtained by drilling with special drills into the substance, for example sediment or rock, with a hollow steel tube called a core drill. The hole made for the core sample is called the "core bowling". A variety of core samplers exist to sample different media under different conditions. More continue to be invented on a regular basis. In the coring process, the sample is pushed more or less intact into the tube. Removed from the tube in the laboratory, it is inspected and analyzed by different techniques and equipment depending on the type of data desired.
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