天天天天躁天天爱天天碰_少妇精品导航_久久er热在这里只有精品66_日本少妇春药特殊按摩3_97亚洲熟妇自偷自拍另类图片

電壓矢量測量選件測試儀T Rex

GROUND THE INSTRUMENT: To minimize shock hazard, the instruments Ground Terminal must be connected to a properly grounded receptacle. In many cases, the quality of the safety ground provided by the power cord does not fulfil safety needs. Also the power cord supplied with the equipment must be connected an electrical receptacle with an electrical ground (safety earth ground). Non grounded instruments are dangerous and may cause instrument damage.

KEEP AWAY FROM LIVE CIRCUITS: Operating personnel must not remove instrument covers. Component replacement and internal adjustments must be made by qualified service personnel. Do not replace components with power cable connected. To avoid injuries, always disconnect power, discharge circuits, and remove external voltage sources before touching components. 電壓矢量測量選件測試儀T Rex