• 2021-04-14
    扩展不确定度,为扩展系数,当为多次测量时取2。4337901b6e11f225afa86bf1c16719e1.pngb0b3fcc636c6bead5ebe42430a197316.png7269ab6955477266e143d2d3ad0bdc11.pngb0b3fcc636c6bead5ebe42430a197316.png