pentax k10d網站相關資料
首頁
pentax k10d網站相關資料
Power Factor Correction
The power factor of an AC electrical power system is defined as the ratio of the real power flowing to the load, to the apparent power in the circuit. …
全文詳情 »
iVokaMINI X
测试帐号:13564653551/000000 ios版已上架:http://app.91.com/Soft/Detail.aspx?Platform=iPhone&f_id=10122087 ================================================== iV …
全文詳情 »