增强型隧道（ENHANCED TUNNELING）需求：七座；一级相位隧道可升级数：一功能：舰队在相位隧道内通行更加迅捷一贰.
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enhanced f-n tunneling 增强f
enhanced F2N tunneling 增
enhanced layer two tunneling protocol 增强型第二层隧道协议
enhanced tunneling
增强隧道
以上为机器翻译结果，长、整句建议使用 人工翻译 。
It's not only effectively reduced the 10,000 tons' tunneling rate and the cost of coal, but also greatly enhanced the recovery of the mine resources, and achieved considerable economic benefits.
其不仅有效的降低了万吨掘进率、降低了原煤成本，而且大大提高了矿井的资源回收率，取得了可观的经济效益。
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