композитни узорак

композитни узорак

a recombined coalbed sample produced by averaging together thickness-weighted coal analyses from partial samples of the coalbed, such as from one or more bench samples, from one or more mine exposures or outcrops where the entire bed could not be accessed in one sample, or from multiple drill cores that were required to retrieve all local sections of a coal seam.

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Thêm hình ảnh

Loại từ: noun
Từ đồng nghĩa:
Blossary:
Ngành nghề/Lĩnh vực: Energy
Category: Coal; Natural gas; Petrol
Company: EIA
Sản phẩm:
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Semiconductors; Semiconductor quality

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Computer; Operating systems

A subset of a population to represent the characteristics of the entire population being studied.

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Agriculture; Rice science

A finite series of observations taken from a population; a portion of a population. Individuals taken from a population to represent it.

бушотина

Energy; Coal

Велика или дубока рупа која је била узрокована бушењем.

пробој

Energy; Coal

Отвор који је направљен преко стубова који омогућавају вентилацију.

Naizmenična struja

Energy; Coal; Natural gas; Petrol

An electric current that reverses its direction at regularly recurring intervals.

битуменска смола

Energy; Coal

A soft coal that is considered better than lignite but worst than anthracite. It's about 60-80% carbon with the rest being water, air, hydrogen, and sulfur.