'd 〔口語(yǔ)〕 1.= had: I'd ... = I had .... 2.= did: Where'd ... = Where did .... 3.= should (或 would): He'd ... = He should (或 would). 4.=-ed: foster'd.
The q - axis and d - axis reactance , in which is parallel structure with several branches , is studied by analytical method 對(duì)具有多條并聯(lián)支路的磁路進(jìn)行了分析研究,給出了其計(jì)算程序。