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What is the common leakage point of vacuum sintering furnace

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.