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(up)date item size
2020-12-27 Technical Data Electron Tubes - Part 1 1127 pages. 256,798,245 bytes
2020-12-27 Technical Data Electron Tubes - Part 2 1129 pages. 235,165,193 bytes
2020-12-27 Technical Data Electron Tubes - Part 3 929 pages. 279,767,947 bytes
2020-12-27 Technical Data Electron Tubes - Part 4 1007 pages. 343,183,370 bytes