给压力表接通标准气源，用相机检测压力表是否显示正确的压力值。
Connect the pressure gauge to the standard gas source and use the camera to test whether the pressure gauge shows the correct pressure value.
给压力表接通标准气源，用相机检测压力表是否显示正确的压力值。
Connect the pressure gauge to the standard gas source and use the camera to test whether the pressure gauge shows the correct pressure value.