海量資源,盡在掌握
 煤粒在燃燒過程中由上升的氣流保持懸浮狀態(tài)的鍋爐。Aboilerinwhichthemilledcoalismaintainedinsuspensionbyarisingcurrentofairduringcombustion. (共 113 字) [閱讀本文] >>