balance pit

基本解释

So this paper points out the disadvantages of pressure balance method, traditional judgment method of water gushing in pit.
因此认为传统判断基坑突水的“压力平衡法”具有一定缺陷。
The quantity of water consumption of apple trees in various growth stages under irrigation condition were obtained through pit test according to the principle of water quantity balance.
按照水量平衡原理，通过测坑试验，得到苹果树各生育期在节灌条件下的耗水量；
The application of dynamic balance to dismantle-free pit fan blower is an effective technique to relieve mechanical oscillation caused ty rotor's unbalance due to the laminas of fan blower.
风机减叶片运行出现的转子失衡现象，采用现场不拆机动平衡，是机械减震的有效方法。