spiral turbine

1 2 3 4 5 ... 螺旋管压力表^ spiral tube pressure gage 蜗壳式水轮机^ spiral turbine 螺旋滤波器^ spiral wave filter ...

直角三角形_馆档网 ... "盘管"," spiral tubular coil" "蜗旋轮机"," spiral turbine" "蜗漩涡流"," spiral vortex" ...