... 长工祖开采法：long face system 长工祖开采：long face mining 长方形井筒：rectangular shaft ...
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long-wall combined-mining face 长壁综采工作面
long face mining
长工作面开采
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Long lead times persist for oil drilling rigs, mining equipment and some other specialized machinery, but generally companies face no supply limitations when considering expansion.
FORBES: Economic Forecast Update, 2013-2014: Light-to-moderate Growth
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