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DIFF Subgroup Additional Only
H01J 2209/265

Surfaces for sealing vessels

Full Title

Apparatus and processes for manufacture of discharge tubes > Sealing parts of the vessel to provide a vacuum enclosure > Surfaces for sealing vessels

Of 2 combined children, 0 exist in both systems.

2 codes are CPC-only extensions.

Note: 2 CPC extensions are marked as secondary classification only.