| 摘要 |
Generation of neutrally-buoyant foam utilizing a lighter-than-air gas. A handheld apparatus for generating and dispensing neutrally-buoyant foam, by mixing together a surfactant solution with a lighter-than-air gas. Methods of generating neutrally-buoyant foam, as well as foam that can solidify and eventually drift to the ground. Alternate embodiments provide a number of means for generating neutrally-buoyant foam, and for digitally recording shapes drawn.
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