The denitrification performance of calcium-based sorbent under mid-temperature range has been investigated on a bench-scale fixed-bed reactor and a pilot-scale fluidized-bed reactor.

使用固定床小型实验台和循环流化床中型实验台，研究了中温干法脱硫技术中的钙基脱除剂的脱硝性能。

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The Nokia Lumia 720 delivers a high end camera performance at a mid-range price point.

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The Nokia Lumia 820 is a snappy, mid-range smartphone that delivers high-end performance in a compact package.

ENGADGET: Nokia Lumia 920 and 820 land stateside on AT&T's 4G LTE network this November