Use radon measurement to explore oil and gas, one have to improve the sampling device and test conditions.

测氡法在应用于油气勘探时，取样装置及测试条件均须改进。

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Use radon measurement to explore oil and gas, one have to improve the sampling device and test conditions.

测氡法在应用于油气勘探时，取样装置及测试条件均须改进。

youdao