仪器需要校正，缩短校正周期。
为了确保新卫星数据与现有的旧数据兼容，新仪器需要对照旧仪器进行校正。
To make data from the new satellites compatible with those collected by the old ones, the new instruments have to be calibrated against the old.
NDA标准样品是成功应用NDA技术的关键，几乎所有的NDA仪器和方法需要标准样品来进行效率刻度和各种响应校正。
NDA standards are an essential part of successful application of NDA techniques, almost NDA instruments and methods require standards to make efficiency calibration and various response corrections.
该仪器安装简单，不需要调试和校正，使用效果良好。
The apparatus can be simply installed and have good operating effects without calibration and commissioning.
该仪器安装简单，不需要调试和校正，使用效果良好。
The apparatus can be simply installed and have good operating effects without calibration and commissioning.
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