dc ammeter meaning in English

直流安培表
直流电表
直流电流计

The dc ammeter will normally be calibrated at full range in each range
直流电流表一般每程均作全量程校正。
Calibration at full range for dc ammeters with not more than 3 ranges
为不超过三个量程的直流电流表全量程校正。
Model j0407 dc ammeter is suitable for students to measure the current in a dc ciruit in laboratory
J0407型直流电流表供学校学生在实验中测量直流电路中的电流用。
Calibration at full range for each additional range on the same dc ammeter ( for ammeters with more than 3 ranges )
为同一直流电流表每一额外量程全量程校正(只适用于超过三个量程的电流表) 。