常見例句This method does not need to untie the pole downlead then to carry on the earth resistance survey, has solved the biggest malpractice which in the existing measuring technique exists . 該方法不需要解開桿塔接地引下線即可進行接地電阻測量，解決了現(xiàn)有測量方法中所存在的最大弊端。The Main Points of Technique to Defend the Lightningproof Downlead Port Laid near the Ground 明敷防雷引下線近地端防護技術(shù)要點antenna downlead 天線下引線 返回 downlead