standard current metre

例句：

1. 1.The standard current metre is used to measure the electrical current in a circuit.
   标准电流表用于测量电路中的电流。
2. 2.The engineer carefully checked the standard current metre before starting the experiment.
   工程师在开始实验前仔细检查了标准电流表。
3. 3. The standard current metre was used to ensure that the power supply was stable and reliable.
   标准电流表被用来确保电源稳定可靠。