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In LLP, two immiscible & saturated wetting liquids are used. Pores are filled with the first liquid, then the second liquid is pressurized to displace the first liquid and flow through the pores. The amount of liquid flowing out is measured. The second liquid's flow rate and differential pressure are measured. Pore distributions are computed as with CFP. In ABPT, bubble point determination is done through a liquid expulsion technique.