Polytropic English Polytropic polytropic process Polytropic 英語版 polytropic process Wikipedia English 英語版 英語版 http://en.wikipedia.org/wiki/Polytropic_process polytropic process polytropic process http://en.wikipedia.org/wiki/Polytropic_process English polytropic process polytropic process Wikipedia article "Polytropic_process" view article Polytropic polytropic process Polytropic polytropic process Polytropic process relationships Polytropic process polytropic process polytrop(isk)e 英語版