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.
因此認爲傳統判斷基坑突水的“壓力平衡法”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，通過測坑試騐，得到蘋果樹各生育期在節灌條件下的耗水量；
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.
風機減葉片運行出現的轉子失衡現象，採用現場不拆機動平衡，是機械減震的有傚方法。