关: Ⅰ动词1.(使开着的物体合拢) close; shut 短语和例子关窗户 shut the window; 他随手轻轻地把门关上了。 he closed the door softly behind him.2.(圈起来) shut in; lock up 短语和例子把鸡关在栅栏里 shut the chickens in a pen; 关进监狱 lock up (in p
The time of opening or closing valve meets users adjustment requirements and ensure the turbine for safely running . the butterfly valve equipped automatic control devices meets the butterfly valve local and remote atomatic control 该阀的开、关阀时间均可调，能满足调保的需要，保证水轮机组安全可靠地运行。
