wéixiū / rényuán / yòng / wànyòngbiǎo / jiǎncè / diànlù / zhōng / de / jīng tǐ èr jí guǎn / shìfǒu / zhèngcháng

维修人员用万用表检测电路中的晶体二极管是否正常。

The repair technician used a multimeter to check whether the crystal diode in the circuit was working properly.