progressing cavity pump的用法和样例：
例句
- Dry installed progressive cavity pumps with sliding block ts to pump sludge and viscous or highly viscous liquids of communal sewage treatment.
干式安装螺杆泵带滑动的可闭节可运送质淤泥和粘性或高粘性流体，适用于公共污水处理。 - This method bears preferable practicality for track coordinates calculation of moulding milling cutters used for machining the screw rotor in the screw pump.
该方法对加工螺杆泵中螺杆转子的成型铣刀轨迹坐标计算具有较好的实用性。
