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文尔兰(Vine 1and)电力公司是美国新泽西州一家小的公用电力公司。该公司没有解冻库,过去在冬季恶劣气候条件下卸车时不得不用油喷灯的明火加热车底和漏斗门,然后再用振动器振动卸煤。若用振动器长时间振动,仍不能卸出煤炭时,只有靠人力用镐和铲卸车,由于劳力和石油费用上涨,必须寻求较好的卸车方法。位于宾夕法尼亚州威廉斯堡(Waynes-burg)的爱墨尔(Emerald)煤矿,承包供应文尔兰电力公司煤炭,做到即使在严冬煤车缓慢通过宾夕法尼亚州运行10天后,煤炭仍能
Vine 1and Power Company is a small utility company in New Jersey, USA. The company did not have a thawing bank, and in the past had to use the open flame of an oil-fired torch to heat the vehicle’s bottom and funnel doors when unloading it in winter in harsh climates and then vibrating the unloading coal with vibrators. If vibrators are used for a long time, coal can not be unloaded. Only by using picks and dump trucks, labor and oil costs have to be improved. Therefore, better methods of unloading trucks must be sought. Coal at the Emerald Coal Mine in Waynes-burg, PA, is contracted to supply Wengerland Power and coal is still available even after a slow winter train ran through Pennsylvania for 10 days