封闭场 meaning in English

containing field

Enclosed field discharge circuit breakers for rotating electric machinery
旋转电机用封闭场励磁放电断路器
2 . using a new method , virtual boundary element method ( vbem ) to electromagnetic calculating . this method , same as boundary element method ( bem ) , need not analysis all the field area , and need not specially deal with no closed in boundaries . future more , vbem has advantage in calculating speed , and can avoid singularity integrating being predestined in bem
2 .使用了一种新方法,虚边界元方法用于强流电子枪电子轨迹的模拟,这种方法与边界元法一样不须要对所有场域进行计算,对于不封闭场域不须要做特殊处理,从而避免了有限元法和有限差分法的方法缺陷,它具有计算速度快的优势,且不存在边界元法所不可避免的奇异积分。