... crimping process ensures absolute gas-tight fit.4. Inner sealing with conductivity glass ensures a fine conductivity ... Part Heating,Low Combination Between Sealant,Low Seal PerformanceHeating combination by sintering furnace,stable quality ... perfomanceWhole AssemblyPoor quality stabilityLarge current hot state seal,high seal performanceAppearanceRough,rolling plate rough screw,sintering scarNice ...