pump circulation meaning in English

泵循环润滑
强制循环

Pump circulation cooling system
水泵循环冷却系统
Pre - heating oven . oil heating for bronzing plate , constant temperature auto control , oil pump circulation
烫金版油加热，恒温自动控制，油泵循环。
7 . holistic moving oil frame , turning the ink in the barrel with the rubber rollers , pneumatic pump circulation
7整体移动式油墨盘架，橡胶轴传墨,气动隔泵循环。
After the surplus size of the thick liquid trough is retrieved or put , can put the branch water properly , heat , wash the pipeline which sends the thick liquid material with pump circulation again , so as not to stop up
浆槽的剩余浆液回收或放掉后，可适当放入清水、用蒸汽加温，再用泵循环清洗输送浆料的管路，以免堵塞。