I think I unlocked the ultimate cheat code for Butterfly rubbers with Spring Sponge X

says Fair Play First
says Fair Play First
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Dry-boosting-method-final.jpgu

🇷🇺 RU Patent illustration #045328.

Roller optimal diameter 14 cm.
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Be happy all

Yes, the outer part of the roller should have an embossed pattern, eg. imitation of a goose skin.
 
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