In order to get ridded of the non real-time detection methods of artificial site sampled and laboratory instrument analyzed in the field of methane detection in the offshore shallow gas. real-time in-situ detection system for methane in offshore shallow gas was designed by the film interface. The methane in the offshore shallow gas through the gas-liquid separation membrane of polymer... https://www.bekindtopets.com/special-pick-Grandpa-s-Best-Prairie-Hay-quick-pick/