Crankshafts, one of the major parts of piston engines, are motionpistonmotion.曲轴是活塞式发动机的主要零部件之一, 加工工艺复杂、要求高.Automobile and motorcycle spare parts - crankshafts, connecting rods, shafts, power steering shafts.汽机车零件 - 曲轴 、...
Revenge leads to a self-perpetuating cycle of violence.怨怨相报会导致永不休止的暴力。She plodded in her perpetuating circle of stove, worktable and sink as if nothing else existed.她只是在炉子 、 工作台和水井这个永恒的小天地里辛勤地劳动,好象其余的一切都不存在似的.Contemporar...