says
Fair Play First
Black oil at the cost of gold. What is it?
The stuff is widely used by Chinese national players to enhance dynamical value of the DHS rubbers. As for its chemical composition, black oil is a napthenic derivative and its most remarkable virtue is the ability to take full effect as soon as in few hours at room temperature.
The stuff is widely used by Chinese national players to enhance dynamical value of the DHS rubbers. As for its chemical composition, black oil is a napthenic derivative and its most remarkable virtue is the ability to take full effect as soon as in few hours at room temperature.
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