the insulating cap of a telegraph pole.
| 单词 | θ77395 |
| 释义 | the world > matter > physics > electromagnetic radiation > electricity > transmission of electricity, conduction > non-conduction, insulation > [noun] > substance or contrivance > parts of (4) pole cap1884 the insulating cap of a telegraph pole. pothead1901 An insulated electrical connector (often with a porcelain body) used for making a sealed joint between conductors, as between an underground cable… switch base1940 (see quot. 1940). grummet1942 A ring or wreath of rope, spec. one consisting of a single strand laid three times round. A washer used to insulate electric conductors passing… |
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