Many variations of these units and many sizes are in operation at present . 现在运转的有很多式样和不同大小的装置。
This eminently reasonable measure, which is in operation in most continental countries, met with a chorus of disapproval in our country . 这种十分合理的措施正在大多数大陆国家中实施，却在我国遭到了异口同声的反对。
B they must have been in operation for a period of at least one year (二)开办至少一年；
The hook rotates at a high speed while the machine is in operation 缝纫机操作中，旋梭高速地旋转。
Ensure that the grille is in place while the machinery is in operation 机器运转时一定要放好安全网罩
Center of nanoscience and nanotechnology of cas is in operation 中国科学院纳米科技中心进入实质性运作阶段
They must have been in operation for a period of at least one year 须经本会承认其非牟利团体；开办至少一年；
Gas supply : the gas west - east transfer project has been in operation 供气： “西气东输”的天然气漯河已经开通。
