蜗壳进口压力
casing inlet pressure
spiral case inlet pressure
排气进口壳体
exhaust gas inlet housing
排气进口壳体总成
exhaust gas inlet housing assembly
保压蜗壳
spiral case of pressure preservations
充水保压蜗壳
pressure-maintaining spiral case by water filling
大小圆蜗壳
major and small circle casing
垫层蜗壳
Spiral Case with Cushion Layer
cushioned spiral case
非圆断面蜗壳水力设计
hydraulic design of spiral case with non-circular