Roadside support technology is a key technology in coal mining, safe, rational and effective roadside support can guarantee high output and efficiency.

巷道支护技术是煤炭开采中的一项关键技术，安全、合理、有效的巷道支护是保证矿井高产高效的必要条件。

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Fully mechanized caving mining has became mining technology of high output and efficiency in thick coal seam mining.

综采放顶煤技术已成为厚煤层开采的高产高效采煤技术。

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ZZS6000/17/37A four pillars chock-shield is fully-mechanized support equipment that is designed for high output and efficiency mine.

ZZS6 0 0 0 / 17/ 37A型四柱支撑掩护式液压支架是专为“高产高效”矿井设计的综采支护设备。

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Of course, measuring the output and efficiency of public services by the numbers of people they deal with is a pretty crude method.

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Second, in the 1970s there was a big gap between the quality of the output and the efficiency of, say, Japanese carmakers and their American peers.

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By the same token, renewable technologies are following similar output efficiency and cost reduction curves, while growing more quickly than most optimistic projections of just a few years ago.

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