航空磁梯度仪在六十年代中期交付使用。
The airborne magnetic gradiometer came into use in the middle 1960s.
重力梯度为重力位的二阶导数，可以通过星载梯度仪进行观测。
Gravity gradient is the second order derivative of gravitational potential, which can be observed by satellite gradiometer.
方法我们利用行为性体温调节反应的原理，研制无线遥测温度梯度仪。
MethodsBy applying the principle of behavioral thermoregulatory responses, we developed a radiotelemetric temperature gradient apparatus.
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