As shown in Figure 7 a, when filtering coffee, both B/A5 and B/A10 started to drip in 10 s, and the drip filtration speed showed a trend of increasing and then decreasing, but the filtration speed of the former was faster than that of the latter, and the former had completed the filtration in 180 s and filtered out about 64 mL of coffee liquid, while the latter did not complete filtration in 180 s and filtered out about 40 mL of coffee liquid at this time.
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