| 单词 | joint box |
| 释义 | > as lemmasjoint box joint box n. a junction-box, esp. one designed to be filled with an insulating material. ΘΚΠ the world > matter > physics > electromagnetic radiation > electricity > transmission of electricity, conduction > wire as conductor > [noun] > protective case junction-box1885 joint box1901 1901 Chambers's Jrnl. Dec. 845/2 A new form of joint-box for forming connections. 1902 Encycl. Brit. XXVIII. 77/2 They are connected by bends or joint-boxes. 1907 J. F. C. Snell Distrib. Electr. Energy v. 269 Joint boxes must be used to connect lengths of cables or conductors equivalent to, or larger than 7–16 S.W.G. 1929 G. W. Stubbings Underground Cable Syst. v. 50 A cast-iron joint box must provide a compound-tight chamber for the filling compound. 1966 J. F. Whitfield Electr. Installations & Regulations vi. 120 There is some saving in cable but extra man-hours are needed for joint-box connections. < as lemmas |
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