In many large farms, the sand is "recycled" from the free stall, into the gutter or alley, carried by water to a recovery system, and then reapplied to the free stall.
在许多大型养殖场中，沙子都是从散栏畜舍中“循环利用”进入排水沟或巷道，跟污水一起被运送到回收系统，然后重新用到散栏畜舍。
Various energy conservation technologies incorporated for water chillers such as heat recovery, ice-thermal storage and free cooling are also introduced.
先进的离心式冷水机组不仅具有制冷功能，而且具有热回收、冰蓄冷、免费取冷等多种功能，节能效果显著。
Operating mode as follows: the summer of refrigeration unit operation, the whole refrigeration heat recovery unit at the same time as the hotel offers free full hot water supply;
运行方式为：夏季机组制冷运行，全热回收机组在制冷的同时为宾馆提供免费的全部热水供应；
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