A. 基坑清理 B. 插入深度 C. 混凝土施工缝 D. 防水材料规格,厚度
A. 流体润滑 B. 边界润滑 C. 间隙润滑 D. 混合润滑
A. no fuel will be delivered through the nozzle B. the nozzle will overheat and crack C. time of injection will change D. fuel will leak into the drain line