coal car ; coal truck ; tram ; coaler
工人们在煤矿里慢吞吞地推着煤车。
In the coal shaft the working-men pushed the coal cars sullenly.
报道称，其中多数是运煤车，他们把公路支线也堵死了。
Most of the vehicles were coal trucks, the report said, which were also blocking feeder roads leading onto the highway.
过去，矿工们要用锄头和铁锨挖煤，然后装上小煤车，之后再用骡子拉出地道。
In the past, miners used picks and shovels to dig the coal and load them on to small carts. Then mules would pull the carts to the entrance.
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