The companies building the canals to transport coal needed surveyors to help them find the coal deposits worth mining as well as to determine the best courses for the canals.

修建运河运输煤炭的公司需要测量员帮助他们找到值得开采的煤矿，并确定运河的最佳路线。

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The business is involved in oil, mining, agriculture, hotels, hospitals, finance and real estate, mostly through his operating companies Corral Group.

业务涉足石油、采矿、农业、酒店、医院、金融和房地产，大部分是通过他的运营公司 Corral Group。

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Mining companies must operate with the highest safety and environmental standards.

矿业企业在运营中必须遵循安全与环境的最高标准。

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In a few years, almost all of the gold from Colorado came from the mining companies.

VOA: special.2009.05.28

These companies brought in mining machines that could dig out the gold from deep underground and separate it from the rock that held it.

VOA: special.2010.03.18

Then they began to die. In some of the gold centers, big mining companies bought up all the land from those who first claimed it.

VOA: special.2010.03.18

You have companies mining data every day.

NPR: Sen. Leahy Looking for Answers on NSA Operations

Mining companies and mining funds (aka miners) are a very popular way to play gold.

FORBES: Golden Canadian Stock

But we do believe there remain contacts between Chinese state companies and mining companies.

BBC: Interview with Lord Malloch Brown