1.Small size, suitable for mini vacuum generator and medium size multi-stage vacuum generator. 1.Small size, suitable for mini vacuum generator and medium size multi-stage vacuum generator. 1.Small size, suitable for mini vacuum generator and medium size multi-stage vacuum generator.

2. PP, PE ye luɔɔi, ye kɛ̈ɛ̈r ye kɛ̈ɛ̈r ye kɛ̈ɛ̈r ye kɛ̈ɛ̈r ye.