本发明公开了一种双效的地源热泵系统。
The invention discloses a double-effect ground source heat pump system.
这个所谓的“双五”规定于1974年生效，但受到了人们的广泛抨击和无视，最终在1993年被废止。
Signed into law in 1974, the so-called "Double Nickel" was widely reviled and widely ignored before it was finally repealed in 1993.
采用数值模拟和实验相结合的方法比较了常规结构和一种特殊结构双载体三效催化转化器的性能。
The performance of dual-bed three-way catalytic converters with conventional structure and a particular structure was compared by numerical simulation and experiment.
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