It includes data from over 50,000 oil, gas, and coal fields in 89 countries.

该数据库收集了895万多石油、天然气和煤田数据。

But the Durham coal owners had a wider problem in that a lot of the best coal fields in Durham were quite well inland, in the area around Bishop Auckland.

但达勒姆煤矿主们面临着一更大问题， 即达勒姆许多质煤田都位于内陆地区，就在主教艾尔沃思镇周边。

It owned its own coal-fields and iron mines and its own forests, and it produces most of the implements used by 10,000,000 farmers.

它拥有自煤田和铁矿以及自林，它生产了 1000 万农民使用大部分农具。

With his early profits he purchased more coal lands until, by 1889, he owned ten thousand coke ovens and was the undisputed " coke king" of Connellsville.

凭借早期利润，他购买了更多煤田，直到 1889 年，他拥有了一万焦炉，成为康奈尔斯维尔无可争议“焦炭王”。