Setup to produce thin soap film to generate colours.String round old pen holds soap solution.2 nylon threads support soap film

- Image ID: B3HTD7
Setup to produce thin soap film to generate colours.String round old pen holds soap solution.2 nylon threads support soap film
sciencephotos / Alamy Stock Photo
Image ID: B3HTD7
Setup to produce thin soap film to generate colours.String round old pen holds soap solution.2 nylon threads support soap film
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