| 摘要 |
1,213,901. Refrigerators; heat transfer systems. PHILIPS GLOEILAMPENFABRIEKEN N.V. 8 Jan., 1968 [11 Jan., 1967], No. 1062/68. Headings F4H and F4U. In the cooling system of Specification 1,213,902 the cold source may be replaced by a bath of liquid hydrogen. The radiation screens may receive cold from a bath of liquid nitrogen surrounding the hydrogen bath. |
