The velocity of gas passing over the object to be cooled determines the rate of heat transferred to the objects.
气体通过被冷却物体的速度决定热传递的速度。
Oxygen Transmission Rate (O2GTR): The quantity of oxygen gas passing through a unit area of the parallel surfaces of a plastic film per unit time under the conditions of test.
译文：氧气透过率（O2GTR）：在试验环境下，在单位时间内、单位面积上透过塑料薄膜两平行平面的氧气总量。
Gas Transmission Rate (GTR) : the quantity of a given gas passing through a unit of the parallel surfaces of a plastic film in unit time under the conditions of test.
译文：气体透过率(GTR)：在试验环境下，在单位时间内、单位面积上透过塑料薄膜两平行平面的特定气体总量。
Gas Transmission Rate (GTR) : the quantity of a given gas passing through a unit of the parallel surfaces of a plastic film in unit time under the conditions of test.
译文：气体透过率：在一定的温度下，在单位时间内单位压力差下，稳定透过单位面积试样的气体体积。
Oxygen Transmission Rate (O2GTR): The quantity of oxygen gas passing through a unit area of the parallel surfaces of a plastic film per unit time under the conditions of test.
氧气透过率（O2GTR）：在试验条件下，在单位时间内透过单位面积试样的氧气数量。
Oxygen Transmission Rate (O2GTR): The quantity of oxygen gas passing through a unit area of the parallel surfaces of a plastic film per unit time under the conditions of test.
氧气透过率（O2GTR）：在试验条件下，在单位时间内透过单位面积试样的氧气数量。
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