working mine造句

Such disasters continue to afflict working mines, especially in mainland China.
The area is still rich in minerals including silver with working mines.
Arizona has 600 working mines and an estimated 120, 000 abandoned mines.
A couple of working mines will continue operations.
At the Edward Stanley Bishop despite the remaining presence of working mines in the constituency.
It's difficult to find working mine in a sentence. 用working mine造句挺难的

Bema has one other working mine, El Refugio, on its properties in the Maricunga.
There are still a handful of cattle ranches in the preserve, and some working mines as well.
He doesn t own a working mine; he finds it easier to rob from the other owners.
The Tyndalls were explored for minerals in the early twentieth century, but no significant working mine ever eventuated.
The Navajo nation says it gains nearly $ 50 million in royalty income a year from four working mines on its reservation.
Some of the traders sneak into closed or working mines to steal equipment, especially cables made of non-ferrous metals.
In the past part of the population worked in coal mining, although there are no working mines in the area now.
Most of the more than 200 working mines, which employ 400, 000 people, are too poor to modernize equipment or upgrade safety.
Today, the project is a working mine which has now doubled its original output and is producing 22 million metric tons of coal per year
In a working mine, the radon level can be controlled by ventilation, sealing off old workings and controlling the water in the mine.

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