Expanding circulating oil cavity on hydrogen side can make circulationfree.
扩大氢侧回油腔的容积改进了国产机回油不畅的问题。
2
As mailboxes throughout the country were being stuffed with newsprint, circulation of free papers in Denmark rose to more than two million, Mr. Bakker said.
丹麦全国各地的信箱塞满了报纸，免费报纸发行量上升到200多万份。
3
A blood clot from somewhere in his body had broken free and been carried through the circulation into the heart, then lodged in his lungs.