...参考方向) 若u21>0,该参考方向为实际方向; 若u21同名端(dotted terminals) 来判断: 已知 同名端(定义):当两个电流分别从两个线圈的对应 端子流入 ,其所产生的磁场相互加强时,则这两个 对应端子称为...
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After the initial drilling, the big platforms are moved to new sites, leaving the refuges dotted with small well heads and large oil and gas terminals, the marshes cut by canals and crisscrossed by pipelines.
CNN: Wildlife, oil battle nothing new to Louisiana
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