measuring hole meaning in English

测量孔

There is a vacuum pump which makes measuring holes produce vacuum pressure and vacuum pressure is transformed into electronic controller through pressure transducer at the same time
仪器配有真空泵，开启后工作台的通道形成了真空，同时压力通过压力变换器输送到电气控制器中进行处理。
Measured hole mass flows and a constant static pressure mixing analysis , together with the measured losses , allowed the decomposition of the losses into three distinct entropy generation mechanisms : loss generation within the hole , loss generation due to the mixing of the coolant with the mainstream , and change in secondary loss generation in the " blade passage
论文还进行了叶片冷却孔质量流的测量与常静压气流混合分析，结合前述气动力损失和冷却空气损耗的测量结果表明，端壁气膜冷却的综合损失明显地由三个部分组成：叶片冷却孔内产生的损失；由于冷却空气与主流热空气的混合产生的损失；二次流的变化产生的损失。