What is the common leakage point of વેક્યુમ સિન્ટરિંગ ભઠ્ઠી

1. Leakage of vacuum pumps such as mechanical pumps, Roots pumps, and diffusion pumps;

2. The capillary tube in the condenser and the joint between the capillary tube and the flange leak;

3. Leakage at the junction of the vacuum pipeline and the elbow and the welding place before the pipeline;

4. Leakage of the vacuum valve itself and its connection with the pipeline.