基准零点的英文

reference datum

• 基准:    datum standard; cr ...
• 零点:    null point; zero e ...
• 标准零点:    normal zero

例句与用法

1. B . all undimensioned features shall be located within a tolerance of . 005 from datum zeroo
   所有未注的特征相对于基准零点的位置偏差须在0 . 005之内
2. Acoustics - reference zero for the calibration of audiometric equipment - reference equivalent threshold sound pressure levels for pure tones and supra - aural earphones
   声学.音响设备校正基准零点.纯音和超听觉耳机用基准等效阈值声压级