jet 喷射jet condenser 喷水凝汽器jet pipe regulator 射淋第器jet proof lighting fitting 防水型装灯配件jewel 宝石jewel bearing 宝石轴承jitter 跳动job oriented terminal 面向椎的终端装置job scheduler 椎等程序Johnsen Rahbeck effect 约翰生·拉别克效应joint 接触点；接头joint bar 接合板joint box 电缆接线箱joint distribution 联合分布joint sleeve 连接套筒joint use 同杆架设joule 焦耳joule effect 焦耳效应joule's law 焦耳定律journal 轴颈jump 转移jump function 跃变函数jump instruction 跳越指令jump spark 跳跃电火花jumper 跨接线jumper cable 跨接电缆jumper wire 跨接线junction 连接junction box 电缆接线箱junction cable 中继电缆junction center 汇接局junction diode 面结型二极管junction field effect transistor 面结型场效应晶体管junction of thermocouple 热电偶接合点junction point 接合点junction transistor 面结型晶体管jute 黄麻jute covering 黄麻包皮jute serving 黄麻包皮jute wrapping 黄麻包皮